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Wu F, Zhao M, Zhang Y, Si W, Cheng B, Li X. Systematic analysis of the Rboh gene family in seven gramineous plants and its roles in response to arbuscular mycorrhizal fungi in maize. BMC PLANT BIOLOGY 2023; 23:603. [PMID: 38030972 PMCID: PMC10688149 DOI: 10.1186/s12870-023-04571-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 10/29/2023] [Indexed: 12/01/2023]
Abstract
BACKGROUND Plant respiratory burst oxidase homolog (Rboh) gene family produces reactive oxygen species (ROS), and it plays key roles in plant-microbe interaction. Most Rboh gene family-related studies mainly focused on dicotyledonous plants; however, little is known about the roles of Rboh genes in gramineae. RESULTS A total of 106 Rboh genes were identified in seven gramineae species, including Zea mays, Sorghum bicolor, Brachypodium distachyon, Oryza sativa, Setaria italica, Hordeum vulgare, and Triticum aestivum. The Rboh protein sequences showed high similarities, suggesting that they may have conserved functions across different species. Duplication mode analysis detected whole-genome/segmental duplication (WGD)/(SD) and dispersed in the seven species. Interestingly, two local duplication (LD, including tandem and proximal duplication) modes were found in Z. mays, S. italica and H. vulgare, while four LD were detected in T. aestivum, indicating that these genes may have similar functions. Collinearity analysis indicated that Rboh genes are at a stable evolution state in all the seven species. Besides, Rboh genes from Z. mays were closely related to those from S. bicolor, consistent with the current understanding of plant evolutionary history. Phylogenetic analysis showed that the genes in the subgroups I and II may participate in plant-AM fungus symbiosis. Cis-element analysis showed that different numbers of elements are related to fungal induction in the promoter region. Expression profiles of Rboh genes in Z. mays suggested that Rboh genes had distinct spatial expression patterns. By inoculation with AM fungi, our transcriptome analysis showed that the expression of Rboh genes varies upon AM fungal inoculation. In particularly, ZmRbohF was significantly upregulated after inoculation with AM fungi. pZmRbohF::GUS expression analyses indicated that ZmRbohF was induced by arbuscular mycorrhizal fungi in maize. By comparing WT and ZmRbohF mutant, we found ZmRbohF had limited impact on the establishment of maize-AM fungi symbiosis, but play critical roles in regulating the proper development of arbuscules. CONCLUSIONS This study provides a comprehensive analysis of the evolution relationship of Rboh genes in seven gramineae species. Results showed that several Rboh genes regulate maize-AM fungal symbiosis process. This study provides valuable information for further studies of Rboh genes in gramineae.
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Affiliation(s)
- Fulang Wu
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, 230036, China
- College of Life Science, Anhui Agricultural University of China, Changjiang West Road, Hefei, 230036, China
| | - Manli Zhao
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, 230036, China
- College of Life Science, Anhui Agricultural University of China, Changjiang West Road, Hefei, 230036, China
| | - Yajing Zhang
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, 230036, China
- College of Life Science, Anhui Agricultural University of China, Changjiang West Road, Hefei, 230036, China
| | - Weina Si
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, 230036, China
- College of Life Science, Anhui Agricultural University of China, Changjiang West Road, Hefei, 230036, China
| | - Beijiu Cheng
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, 230036, China.
- College of Life Science, Anhui Agricultural University of China, Changjiang West Road, Hefei, 230036, China.
| | - Xiaoyu Li
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, 230036, China.
- College of Life Science, Anhui Agricultural University of China, Changjiang West Road, Hefei, 230036, China.
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Jiang L, Liu K, Zhang T, Chen J, Zhao S, Cui Y, Zhou W, Yu Y, Chen S, Wang C, Zhang C. The RhWRKY33a-RhPLATZ9 regulatory module delays petal senescence by suppressing rapid reactive oxygen species accumulation in rose flowers. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 114:1425-1442. [PMID: 36951178 DOI: 10.1111/tpj.16202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 02/12/2023] [Accepted: 03/10/2023] [Indexed: 06/17/2023]
Abstract
Redox homeostasis in plant cells is critical for maintaining normal growth and development because reactive oxygen species (ROS) can function as signaling molecules or toxic compounds. However, how plants fine-tune redox homeostasis during natural or stress-induced senescence remains unclear. Cut roses (Rosa hybrida), an economically important ornamental product worldwide, often undergo stress-induced precocious senescence at the post-harvest bud stage. Here, we identified RhPLATZ9, an age- and dehydration-induced PLATZ (plant AT-rich sequence and zinc-binding) protein, and determined that it functions as a transcriptional repressor in rose flowers during senescence. We also showed that RhWRKY33a regulates RhPLATZ9 expression during flower senescence. RhPLATZ9-silenced flowers and RhWRKY33a-silenced flowers showed accelerated senescence, with higher ROS contents than the control. By contrast, overexpression of RhWRKY33a or RhPLATZ9 delayed flower senescence, and overexpression in rose calli showed lower ROS accumulation than the control. RNA-sequencing analysis revealed that apoplastic NADPH oxidase genes (RhRbohs) were enriched among the upregulated differentially expressed genes in RhPLATZ9-silenced flowers compared to wild-type flowers. Yeast one-hybrid assays, electrophoretic mobility shift assays, dual luciferase assays and chromatin immunoprecipitation quantitative PCR confirmed that the RhRbohD gene is a direct target of RhPLATZ9. These findings suggest that the RhWRKY33a-RhPLATZ9-RhRbohD regulatory module acts as a brake to help maintain ROS homeostasis in petals and thus antagonize age- and stress-induced precocious senescence in rose flowers.
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Affiliation(s)
- Liwei Jiang
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Kun Liu
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Tao Zhang
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Jin Chen
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Siqi Zhao
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Yusen Cui
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Wentong Zhou
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Yi Yu
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Siyu Chen
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Caiyuan Wang
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Changqing Zhang
- Department of Ornamental Horticulture, College of Horticulture, China Agricultural University, Beijing, 100193, China
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Otulak-Kozieł K, Kozieł E, Treder K, Király L. Glutathione Contribution in Interactions between Turnip mosaic virus and Arabidopsis thaliana Mutants Lacking Respiratory Burst Oxidase Homologs D and F. Int J Mol Sci 2023; 24:ijms24087128. [PMID: 37108292 PMCID: PMC10138990 DOI: 10.3390/ijms24087128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 04/04/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
Respiratory burst oxidase homologs (Rbohs) play crucial and diverse roles in plant tissue-mediated production of reactive oxygen species during the development, growth, and response of plants to abiotic and biotic stress. Many studies have demonstrated the contribution of RbohD and RbohF in stress signaling in pathogen response differentially modulating the immune response, but the potential role of the Rbohs-mediated response in plant-virus interactions remains unknown. The present study analyzed, for the first time, the metabolism of glutathione in rbohD-, rbohF-, and rbohD/F-transposon-knockout mutants in response to Turnip mosaic virus (TuMV) infection. rbohD-TuMV and Col-0-TuMV interactions were characterized by susceptible reaction to TuMV, associated with significant activity of GPXLs (glutathione peroxidase-like enzymes) and induction of lipid peroxidation in comparison to mock-inoculated plants, with reduced total cellular and apoplastic glutathione content observed at 7-14 dpi and dynamic induction of apoplast GSSG (oxidized glutathione) at 1-14 dpi. Systemic virus infection resulted in the induction of AtGSTU1 and AtGSTU24, which was highly correlated with significant downregulation of GSTs (glutathione transferases) and cellular and apoplastic GGT (γ-glutamyl transferase) with GR (glutathione reductase) activities. On the contrary, resistant rbohF-TuMV reactions, and especially enhanced rbohD/F-TuMV reactions, were characterized by a highly dynamic increase in total cellular and apoplastic glutathione content, with induction of relative expression of AtGGT1, AtGSTU13, and AtGSTU19 genes. Moreover, virus limitation was highly correlated with the upregulation of GSTs, as well as cellular and apoplastic GGT with GR activities. These findings clearly indicate that glutathione can act as a key signaling factor in not only susceptible rbohD reaction but also the resistance reaction presented by rbohF and rbohD/F mutants during TuMV interaction. Furthermore, by actively reducing the pool of glutathione in the apoplast, GGT and GR enzymes acted as a cell first line in the Arabidopsis-TuMV pathosystem response, protecting the cell from oxidative stress in resistant interactions. These dynamically changed signal transductions involved symplast and apoplast in mediated response to TuMV.
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Affiliation(s)
- Katarzyna Otulak-Kozieł
- Department of Botany, Institute of Biology, Faculty of Biology and Biotechnology, Warsaw University of Life Sciences-SGGW, Nowoursynowska Street 159, 02-776 Warsaw, Poland
| | - Edmund Kozieł
- Department of Botany, Institute of Biology, Faculty of Biology and Biotechnology, Warsaw University of Life Sciences-SGGW, Nowoursynowska Street 159, 02-776 Warsaw, Poland
| | - Krzysztof Treder
- Laboratory of Molecular Diagnostic and Biochemistry, Bonin Research Center, Plant Breeding and Acclimatization Institute-National Research Institute, 76-009 Bonin, Poland
| | - Lóránt Király
- Plant Protection Institute, Centre for Agricultural Research, Eötvös Loránd Research Network (ELKH), 15 Herman Ottó Str., H-1022 Budapest, Hungary
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Zhai L, Sun Q, Gao M, Cheng X, Liao X, Wu T, Zhang X, Xu X, Wang Y, Han Z. MxMPK4-1 phosphorylates NADPH oxidase to trigger the MxMPK6-2-MxbHLH104 pathway mediated Fe deficiency responses in apple. PLANT, CELL & ENVIRONMENT 2022; 45:2810-2826. [PMID: 35748023 DOI: 10.1111/pce.14384] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 02/28/2022] [Indexed: 06/15/2023]
Abstract
Iron (Fe) deficiency is a nutritional stress in plants that commonly occurs in alkaline and calcareous soils. Mitogen-activated protein kinases (MPKs), the terminal player of MAPK cascade, are involved in distinct physiological processes. Once plants suffer from Fe deficiency stress, the mechanism of MPK function remains unclear owing to limited study on the MPK networks including substrate proteins and downstream pathways. Here, the MAP kinase MPK4-1 was induced in roots of Fe efficient apple rootstock Malus xiaojinensis but not in Fe inefficient rootstock Malus baccata under Fe deficiency conditions. Overexpression of MxMPK4-1 in apple calli and apple roots enhanced the responses to Fe deficiency. We found that MxMPK4-1 interacted with NADPH oxidases (NOX)-respiratory burst oxidase homologs MxRBOHD1 and MxRBOHD2, which positively regulated responses to Fe deficiency. Moreover, MxMPK4-1 phosphorylated the C terminus of MxRBOHD2 at Ser797 and Ser906 and positively and negatively regulated NOX activity through these phospho-sites, respectively. When compared with apple calli that overexpressed MxRBOHD2, the coexpression of MxMPK4-1 and MxRBOHD2 prominently enhanced the Fe deficiency responses. We also demonstrated that hydrogen peroxide derived from MxMPK4-1-MxRBOHD2 regulated the MxMPK6-2-MxbHLH104 pathway, illuminating a systematic network that involves different MPK proteins in M. xiaojinensis under Fe deficiency stress.
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Affiliation(s)
- Longmei Zhai
- Department of Fruit Science, College of Horticulture, China Agricultural University, Beijing, People's Republic of China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture and Rural Affairs, Beijing, People's Republic of China
| | - Qiran Sun
- Department of Fruit Science, College of Horticulture, China Agricultural University, Beijing, People's Republic of China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture and Rural Affairs, Beijing, People's Republic of China
| | - Min Gao
- Department of Fruit Science, College of Horticulture, China Agricultural University, Beijing, People's Republic of China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture and Rural Affairs, Beijing, People's Republic of China
| | - Xinxin Cheng
- Department of Fruit Science, College of Horticulture, China Agricultural University, Beijing, People's Republic of China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture and Rural Affairs, Beijing, People's Republic of China
| | - Xiaojun Liao
- Department of Food Science and Engineering, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, People's Republic of China
- Beijing Key Laboratory for Food Nonthermal Processing, Chinese National Engineering Research Centre for Fruit and Vegetable Processing, Beijing, People's Republic of China
- Key Lab of Fruit and Vegetable Processing, Ministry of Agriculture and Rural Affairs, Beijing, People's Republic of China
| | - Ting Wu
- Department of Fruit Science, College of Horticulture, China Agricultural University, Beijing, People's Republic of China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture and Rural Affairs, Beijing, People's Republic of China
| | - Xinzhong Zhang
- Department of Fruit Science, College of Horticulture, China Agricultural University, Beijing, People's Republic of China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture and Rural Affairs, Beijing, People's Republic of China
| | - Xuefeng Xu
- Department of Fruit Science, College of Horticulture, China Agricultural University, Beijing, People's Republic of China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture and Rural Affairs, Beijing, People's Republic of China
| | - Yi Wang
- Department of Fruit Science, College of Horticulture, China Agricultural University, Beijing, People's Republic of China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture and Rural Affairs, Beijing, People's Republic of China
| | - Zhenhai Han
- Department of Fruit Science, College of Horticulture, China Agricultural University, Beijing, People's Republic of China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture and Rural Affairs, Beijing, People's Republic of China
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5
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Receptor for Activated C Kinase1B (OsRACK1B) Impairs Fertility in Rice through NADPH-Dependent H2O2 Signaling Pathway. Int J Mol Sci 2022; 23:ijms23158455. [PMID: 35955593 PMCID: PMC9368841 DOI: 10.3390/ijms23158455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 07/25/2022] [Accepted: 07/25/2022] [Indexed: 11/16/2022] Open
Abstract
The scaffold protein receptor for Activated C Kinase1 (RACK1) regulates multiple aspects of plants, including seed germination, growth, environmental stress responses, and flowering. Recent studies have revealed that RACK1 is associated with NADPH-dependent reactive oxygen species (ROS) signaling in plants. ROS, as a double-edged sword, can modulate several developmental pathways in plants. Thus, the resulting physiological consequences of perturbing the RACK1 expression-induced ROS balance remain to be explored. Herein, we combined molecular, pharmacological, and ultrastructure analysis approaches to investigate the hypothesized connection using T-DNA-mediated activation-tagged RACK1B overexpressed (OX) transgenic rice plants. In this study, we find that OsRACK1B-OX plants display reduced pollen viability, defective anther dehiscence, and abnormal spikelet morphology, leading to partial spikelet sterility. Microscopic observation of the mature pollen grains from the OX plants revealed abnormalities in the exine and intine structures and decreased starch granules in the pollen, resulting in a reduced number of grains per locule from the OX rice plants as compared to that of the wild-type (WT). Histochemical staining revealed a global increase in hydrogen peroxide (H2O2) in the leaves and roots of the transgenic lines overexpressing OsRACK1B compared to that of the WT. However, the elevated H2O2 in tissues from the OX plants can be reversed by pre-treatment with diphenylidonium (DPI), an NADPH oxidase inhibitor, indicating that the source of H2O2 could be, in part, NADPH oxidase. Expression analysis showed a differential expression of the NADPH/respiratory burst oxidase homolog D (RbohD) and antioxidant enzyme-related genes, suggesting a homeostatic mechanism of H2O2 production and antioxidant enzyme activity. BiFC analysis demonstrated that OsRACK1B interacts with the N-terminal region of RbohD in vivo. Taken together, these data indicate that elevated OsRACK1B accumulates a threshold level of ROS, in this case H2O2, which negatively regulates pollen development and fertility. In conclusion, we hypothesized that an optimal expression of RACK1 is critical for fertility in rice plants.
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6
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El-Sappah AH, Rather SA, Wani SH, Elrys AS, Bilal M, Huang Q, Dar ZA, Elashtokhy MMA, Soaud N, Koul M, Mir RR, Yan K, Li J, El-Tarabily KA, Abbas M. Heat Stress-Mediated Constraints in Maize ( Zea mays) Production: Challenges and Solutions. FRONTIERS IN PLANT SCIENCE 2022; 13:879366. [PMID: 35615131 PMCID: PMC9125997 DOI: 10.3389/fpls.2022.879366] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 03/30/2022] [Indexed: 05/05/2023]
Abstract
An increase in temperature and extreme heat stress is responsible for the global reduction in maize yield. Heat stress affects the integrity of the plasma membrane functioning of mitochondria and chloroplast, which further results in the over-accumulation of reactive oxygen species. The activation of a signal cascade subsequently induces the transcription of heat shock proteins. The denaturation and accumulation of misfolded or unfolded proteins generate cell toxicity, leading to death. Therefore, developing maize cultivars with significant heat tolerance is urgently required. Despite the explored molecular mechanism underlying heat stress response in some plant species, the precise genetic engineering of maize is required to develop high heat-tolerant varieties. Several agronomic management practices, such as soil and nutrient management, plantation rate, timing, crop rotation, and irrigation, are beneficial along with the advanced molecular strategies to counter the elevated heat stress experienced by maize. This review summarizes heat stress sensing, induction of signaling cascade, symptoms, heat stress-related genes, the molecular feature of maize response, and approaches used in developing heat-tolerant maize varieties.
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Affiliation(s)
- Ahmed H. El-Sappah
- School of Agriculture, Forestry and Food Engineering, Yibin University, Yibin, China
- Department of Genetics, Faculty of Agriculture, Zagazig University, Zagazig, Egypt
- Key Laboratory of Sichuan Province for Refining Sichuan Tea, Yibin, China
| | - Shabir A. Rather
- Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, China
| | - Shabir Hussain Wani
- Mountain Research Centre for Field Crops Khudwani Anantnag, SKUAST–Kashmir, Srinagar, India
| | - Ahmed S. Elrys
- Department of Soil Science, Faculty of Agriculture, Zagazig University, Zagazig, Egypt
| | - Muhammad Bilal
- School of Life Sciences and Food Engineering, Huaiyin Institute of Technology, Huaian, China
| | - Qiulan Huang
- Key Laboratory of Sichuan Province for Refining Sichuan Tea, Yibin, China
- College of Tea Science, Yibin University, Yibin, China
| | - Zahoor Ahmad Dar
- Dryland Agriculture Research Station, SKUAST–Kashmir, Srinagar, India
| | | | - Nourhan Soaud
- Department of Crop Science, Faculty of Agriculture, Zagazig University, Zagazig, Egypt
| | - Monika Koul
- Department of Botany, Hansraj College, University of Delhi, New Delhi, India
| | - Reyazul Rouf Mir
- Division of Genetics and Plant Breeding, Faculty of Agriculture (FoA), SKUAST–Kashmir, Sopore, India
| | - Kuan Yan
- School of Agriculture, Forestry and Food Engineering, Yibin University, Yibin, China
- Key Laboratory of Sichuan Province for Refining Sichuan Tea, Yibin, China
| | - Jia Li
- School of Agriculture, Forestry and Food Engineering, Yibin University, Yibin, China
- Key Laboratory of Sichuan Province for Refining Sichuan Tea, Yibin, China
| | - Khaled A. El-Tarabily
- Department of Biology, College of Science, United Arab Emirates University, Al Ain, United Arab Emirates
- Harry Butler Institute, Murdoch University, Murdoch, WA, Australia
| | - Manzar Abbas
- School of Agriculture, Forestry and Food Engineering, Yibin University, Yibin, China
- Key Laboratory of Sichuan Province for Refining Sichuan Tea, Yibin, China
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Burian M, Podgórska A, Ostaszewska-Bugajska M, Szal B. Respiratory Burst Oxidase Homolog D as a Modulating Component of Oxidative Response under Ammonium Toxicity. Antioxidants (Basel) 2022; 11:antiox11040703. [PMID: 35453389 PMCID: PMC9031508 DOI: 10.3390/antiox11040703] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/30/2022] [Accepted: 03/30/2022] [Indexed: 12/25/2022] Open
Abstract
Delayed growth, a visible phenotypic component of the so-called ammonium syndrome, occurs when ammonium is the sole inorganic nitrogen source. Previously, we have shown that modification of apoplastic reactive oxygen species (apROS) metabolism is a key factor contributing to plant growth retardation under ammonium nutrition. Here, we further analyzed the changes in apROS metabolism in transgenic plants with disruption of the D isoform of the respiratory burst oxidase homolog (RBOH) that is responsible for apROS production. Ammonium-grown Arabidopsisrbohd plants are characterized by up to 50% lower contents of apoplastic superoxide and hydrogen peroxide. apROS sensing markers such as OZF1 and AIR12 were downregulated, and the ROS-responsive signaling pathway, including MPK3, was also downregulated in rbohd plants cultivated using ammonium as the sole nitrogen source. Additionally, the expression of the cell-wall-integrity marker FER and peroxidases 33 and 34 was decreased. These modifications may contribute to phenomenon wherein ammonium inhibited the growth of transgenic plants to a greater extent than that of wild-type plants. Overall, this study indicated that due to disruption of apROS metabolism, rbohd plants cannot adjust to ammonium toxicity and are more sensitive to these conditions.
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Li J, Liang J, Wu L, Xu Y, Xiao C, Yang X, Sun R, Zhao J, Xu J, Liu Q, Zhou B. CYT387, a JAK-Specific Inhibitor Impedes Osteoclast Activity and Oophorectomy-Induced Osteoporosis via Modulating RANKL and ROS Signaling Pathways. Front Pharmacol 2022; 13:829862. [PMID: 35345816 PMCID: PMC8957263 DOI: 10.3389/fphar.2022.829862] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 01/26/2022] [Indexed: 12/25/2022] Open
Abstract
Osteoclasts are of hematopoietic lineage and have the ability to degrade mineralized bone tissues. Abnormalities in osteoclastic activity under certain pathological conditions are common in bone diseases such as osteoporosis, osteosclerosis, and arthritis. Although many kinds of drugs are currently used to treat osteoporosis, they have obvious adverse reactions and limitations. CYT387 is a new small-molecule Janus kinase (JAK) inhibitor involved in hematopoiesis, immune modulation, fertility, lactation, and embryonic development. However, it has remained unclear whether CYT387 functionally impacts osteoclast formation. Our study demonstrated through osteoclast formation assay in vitro, that the use of CYT387 is a potential drug candidate for treating osteoclast-associated bone disease. The effects of CYT387 on osteoclast formation, bone resorption, NFATc1 activation, and especially intracellular ROS levels were investigated in vitro. Further, we examined the preclinical prospects of CYT387 using an oophorectomy (OVX) mouse model of osteoporosis with its anti-osteoclast activity in vivo. On the whole, this study shows that CYT387 holds promise for treating osteoclast-related bone illnesses including osteoporosis.
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Affiliation(s)
- Jing Li
- Collaborative Innovation Center of Regenerative Medicine and Medical Biological Resources Development and Application, Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Jiamin Liang
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Liwei Wu
- Collaborative Innovation Center of Regenerative Medicine and Medical Biological Resources Development and Application, Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Yang Xu
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | | | - Xue Yang
- The Second Nanning People's Hospital, Nanning, China
| | - Ran Sun
- Collaborative Innovation Center of Regenerative Medicine and Medical Biological Resources Development and Application, Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Jinmin Zhao
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Jiake Xu
- School of Biomedical Sciences, The University of Western Australia, Perth, WA, Australia
| | - Qian Liu
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Bo Zhou
- Collaborative Innovation Center of Regenerative Medicine and Medical Biological Resources Development and Application, Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
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9
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Xiang Y, Bian X, Wei T, Yan J, Sun X, Han T, Dong B, Zhang G, Li J, Zhang A. ZmMPK5 phosphorylates ZmNAC49 to enhance oxidative stress tolerance in maize. THE NEW PHYTOLOGIST 2021; 232:2400-2417. [PMID: 34618923 DOI: 10.1111/nph.17761] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 09/17/2021] [Indexed: 05/16/2023]
Abstract
Mitogen-activated protein kinase (MPK) is a critical regulator of the antioxidant defence system in response to various stimuli. However, how MPK directly and exactly regulates antioxidant enzyme activities is still unclear. Here, we demonstrated that a NAC transcription factor ZmNAC49 mediated the regulation of antioxidant enzyme activities by ZmMPK5. ZmNAC49 expression is induced by oxidative stress. ZmNAC49 enhances oxidative stress tolerance in maize, and it also reduces superoxide anion generation and increases superoxide dismutase (SOD) activity. A detailed study showed that ZmMPK5 directly interacts with and phosphorylates ZmNAC49 in vitro and in vivo. ZmMPK5 directly phosphorylates Thr-26 in NAC subdomain A of ZmNAC49. Mutation at Thr-26 of ZmNAC49 does not affect the interaction with ZmMPK5 and its subcellular localisation. Further analysis found that ZmNAC49 activates the ZmSOD3 expression by directly binding to its promoter. ZmMPK5-mediated ZmNAC49 phosphorylation improves its ability to bind to the ZmSOD3 promoter. Thr-26 of ZmNAC49 is essential for its transcriptional activity. In addition, ZmSOD3 enhances oxidative stress tolerance in maize. Our results show that phosphorylation of Thr-26 in ZmNAC49 by ZmMPK5 increased its DNA-binding activity to the ZmSOD3 promoter, enhanced SOD activity and thereby improved oxidative stress tolerance in maize.
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Affiliation(s)
- Yang Xiang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Xiangli Bian
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Tianhui Wei
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Jingwei Yan
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Xiujuan Sun
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Tong Han
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Baicheng Dong
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Gaofeng Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Jing Li
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Aying Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
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10
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Haider S, Iqbal J, Naseer S, Yaseen T, Shaukat M, Bibi H, Ahmad Y, Daud H, Abbasi NL, Mahmood T. Molecular mechanisms of plant tolerance to heat stress: current landscape and future perspectives. PLANT CELL REPORTS 2021; 40:2247-2271. [PMID: 33890138 DOI: 10.1007/s00299-021-02696-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 04/08/2021] [Indexed: 06/12/2023]
Abstract
We summarize recent studies focusing on the molecular basis of plant heat stress response (HSR), how HSR leads to thermotolerance, and promote plant adaptation to recurring heat stress events. The global crop productivity is facing unprecedented threats due to climate change as high temperature negatively influences plant growth and metabolism. Owing to their sessile nature, plants have developed complex signaling networks which enable them to perceive changes in ambient temperature. This in turn activates a suite of molecular changes that promote plant survival and reproduction under adverse conditions. Deciphering these mechanisms is an important task, as this could facilitate development of molecular markers, which could be ultimately used to breed thermotolerant crop cultivars. In current article, we summarize mechanisms involve in plant heat stress acclimation with special emphasis on advances related to heat stress perception, heat-induced signaling, heat stress-responsive gene expression and thermomemory that promote plant adaptation to short- and long-term-recurring heat-stress events. In the end, we will discuss impact of emerging technologies that could facilitate the development of heat stress-tolerant crop cultivars.
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Affiliation(s)
- Saqlain Haider
- Plant Biochemistry and Molecular Biology Laboratory, Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Javed Iqbal
- Plant Biochemistry and Molecular Biology Laboratory, Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
- Center for Plant Sciences and Biodiversity, University of Swat, Kanju, 19201, Pakistan.
| | - Sana Naseer
- Plant Biochemistry and Molecular Biology Laboratory, Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Tabassum Yaseen
- Department of Botany, Bacha Khan University, Charsadda, Khyber Pakhtunkhwa, Pakistan
| | - Muzaffar Shaukat
- Plant Biochemistry and Molecular Biology Laboratory, Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Haleema Bibi
- Plant Biochemistry and Molecular Biology Laboratory, Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Yumna Ahmad
- Plant Biochemistry and Molecular Biology Laboratory, Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Hina Daud
- Plant Biochemistry and Molecular Biology Laboratory, Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Nayyab Laiba Abbasi
- Plant Biochemistry and Molecular Biology Laboratory, Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Tariq Mahmood
- Plant Biochemistry and Molecular Biology Laboratory, Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
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11
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Li D, Sun Q, Zhang G, Zhai L, Li K, Feng Y, Wu T, Zhang X, Xu X, Wang Y, Han Z. MxMPK6-2-bHLH104 interaction is involved in reactive oxygen species signaling in response to iron deficiency in apple rootstock. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:1919-1932. [PMID: 33216933 DOI: 10.1093/jxb/eraa547] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 11/15/2020] [Indexed: 05/16/2023]
Abstract
Iron (Fe) is a trace element necessary for plant growth. Many land plants have evolved a set of mechanisms associated with the Fe absorption process to deal with the problem of insufficient Fe supply in the soil. During Fe absorption, reactive oxygen species (ROS) can be used as a signal to initiate a response to stress caused by Fe deficiency. However, the molecular mechanisms underlying the involvement of ROS in the Fe deficiency stress response remains unclear. In this study, we have identified a kinase, MxMPK6-2, from Malus xiaojinensis, an apple rootstock that is highly efficient at Fe absorption. MxMPK6-2 has been shown to be responsive to ROS signals during Fe deficiency, and MxMPK6-2 overexpression in apple calli enhanced its tolerance to Fe deficiency. We further screened for proteins in the Fe absorption pathway and identified MxbHLH104, a transcription factor which interacts with MxMPK6-2. MxbHLH104 can be phosphorylated by MxMPK6-2 in vivo, and we confirmed that its phosphorylation increased Fe absorption in apple calli under Fe deficiency, with the presence of ROS promoting this process. Overall, we have demonstrated that MxMPK6-2 is responsive to ROS signaling during Fe deficiency, and is able to control its response by regulating MxbHLH104.
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Affiliation(s)
- Duyue Li
- College of Horticulture, China Agricultural University, Beijing, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture, Beijing, P. R. China
| | - Qiran Sun
- College of Horticulture, China Agricultural University, Beijing, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture, Beijing, P. R. China
| | - Guifen Zhang
- College of Horticulture, China Agricultural University, Beijing, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture, Beijing, P. R. China
| | - Longmei Zhai
- College of Horticulture, China Agricultural University, Beijing, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture, Beijing, P. R. China
| | - Keting Li
- College of Horticulture, China Agricultural University, Beijing, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture, Beijing, P. R. China
| | - Yi Feng
- College of Horticulture, China Agricultural University, Beijing, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture, Beijing, P. R. China
| | - Ting Wu
- College of Horticulture, China Agricultural University, Beijing, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture, Beijing, P. R. China
| | - Xinzhong Zhang
- College of Horticulture, China Agricultural University, Beijing, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture, Beijing, P. R. China
| | - Xuefeng Xu
- College of Horticulture, China Agricultural University, Beijing, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture, Beijing, P. R. China
| | - Yi Wang
- College of Horticulture, China Agricultural University, Beijing, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture, Beijing, P. R. China
| | - Zhenhai Han
- College of Horticulture, China Agricultural University, Beijing, P. R. China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Nutrition and Physiology), Ministry of Agriculture, Beijing, P. R. China
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12
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Zhang ZD, Yang YJ, Liu XW, Qin Z, Li SH, Li JY. Aspirin eugenol ester ameliorates paraquat-induced oxidative damage through ROS/p38-MAPK-mediated mitochondrial apoptosis pathway. Toxicology 2021; 453:152721. [PMID: 33592258 DOI: 10.1016/j.tox.2021.152721] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 02/02/2021] [Accepted: 02/08/2021] [Indexed: 01/06/2023]
Abstract
Paraquat (PQ) is an effective and commercially important herbicide that is widely used worldwide. However, PQ is highly toxic and can cause various complications and acute organ damage. Aspirin eugenol ester (AEE) is a potential new compound with anti-inflammatory and antioxidant stress pharmacological activity. The present study was to reveal the therapeutic effects and the protective effect of AEE against PQ-induced acute lung injury (ALI) with the help of PQ-induced oxidative damage in A549 cells and PQ-induced lung injury in rats. AEE might have no significant therapeutic effect on PQ-induced lung injury in rats. However, AEE had a significant protective effect on PQ-induced lung injury in rats. AEE pretreatment significantly reduced the stimulatory effect of PQ on malondialdehyde (MDA), the inhibitory effect of PQ on catalase (CAT) activity, superoxide dismutase (SOD) activity, glutathione peroxidase (GPx) activity, the ratio of GSH/GSSH, the activity of caspase-3 and the overexpression of p38 mitogen-activated protein kinase (MAPK) phosphorylation in vivo. In vitro, A549 cells were treated with 250 μM PQ for 24 h. Incubation of A549 cells with PQ led to apoptosis, and increased the level of superoxide anions, reactive oxygen species (ROS), malondialdehyde and the activity of caspase-3 and up-regulation of phosphorylated p38-MAPK, reduced mitochondrial membrane potential (ΔΨm) and the activity of SOD. However, after 24 h on AEE pretreatment of A549 cells, the above-mentioned adverse reactions caused by PQ were significantly alleviated. In addition, AEE pretreatment reduced p38-MAPK phosphorylation in PQ-treated A549 cells. SB203580, the specific p38-MAPK inhibitor, and p38-MAPK shRNA attenuated the activation of the p38-MAPK signaling pathway. N-acetylcysteine (NAC) reduced the level of phosphorylated p38-MAPK and the production of intracellular ROS and inhibited apoptosis. The results showed that AEE may inhibit PQ-induced cell damage through ROS/p38-MAPK-mediated mitochondrial apoptosis pathway.
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Affiliation(s)
- Zhen-Dong Zhang
- Key Lab of New Animal Drug Project of Gansu Province, Key Lab of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China.
| | - Ya-Jun Yang
- Key Lab of New Animal Drug Project of Gansu Province, Key Lab of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China.
| | - Xi-Wang Liu
- Key Lab of New Animal Drug Project of Gansu Province, Key Lab of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China.
| | - Zhe Qin
- Key Lab of New Animal Drug Project of Gansu Province, Key Lab of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China.
| | - Shi-Hong Li
- Key Lab of New Animal Drug Project of Gansu Province, Key Lab of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China.
| | - Jian-Yong Li
- Key Lab of New Animal Drug Project of Gansu Province, Key Lab of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou, 730050, China.
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13
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Dvořák P, Krasylenko Y, Zeiner A, Šamaj J, Takáč T. Signaling Toward Reactive Oxygen Species-Scavenging Enzymes in Plants. FRONTIERS IN PLANT SCIENCE 2021; 11:618835. [PMID: 33597960 PMCID: PMC7882706 DOI: 10.3389/fpls.2020.618835] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 12/11/2020] [Indexed: 05/26/2023]
Abstract
Reactive oxygen species (ROS) are signaling molecules essential for plant responses to abiotic and biotic stimuli as well as for multiple developmental processes. They are produced as byproducts of aerobic metabolism and are affected by adverse environmental conditions. The ROS content is controlled on the side of their production but also by scavenging machinery. Antioxidant enzymes represent a major ROS-scavenging force and are crucial for stress tolerance in plants. Enzymatic antioxidant defense occurs as a series of redox reactions for ROS elimination. Therefore, the deregulation of the antioxidant machinery may lead to the overaccumulation of ROS in plants, with negative consequences both in terms of plant development and resistance to environmental challenges. The transcriptional activation of antioxidant enzymes accompanies the long-term exposure of plants to unfavorable environmental conditions. Fast ROS production requires the immediate mobilization of the antioxidant defense system, which may occur via retrograde signaling, redox-based modifications, and the phosphorylation of ROS detoxifying enzymes. This review aimed to summarize the current knowledge on signaling processes regulating the enzymatic antioxidant capacity of plants.
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14
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Mahalingam R, Graham D, Walling JG. The Barley ( Hordeum vulgare ssp. vulgare) Respiratory Burst Oxidase Homolog (HvRBOH) Gene Family and Their Plausible Role on Malting Quality. FRONTIERS IN PLANT SCIENCE 2021; 12:608541. [PMID: 33679826 PMCID: PMC7934426 DOI: 10.3389/fpls.2021.608541] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 01/27/2021] [Indexed: 05/12/2023]
Abstract
Controlled generation of reactive oxygen species (ROS) is pivotal for normal plant development and adaptation to changes in the external milieu. One of the major enzymatic sources of ROS in plants are the plasma-membrane localized NADPH oxidases, also called as Respiratory Burst Oxidase Homologs (RBOH). In addition to the six previously reported, seven new members of RBOH gene family were identified in barley using in silico analysis. Conservation of genomic structure and key residues important for catalytic activity and co-factor binding was observed in barley RBOH genes. Phylogenetic analysis of plant RBOHs revealed distinct clades for monocot and dicot RBOH proteins. Hence, we propose to use the rice nomenclature for naming barley RBOH genes. Temporal changes in ROS profiles were observed during barley malting and was accompanied by changes in protein carbonylation, lipid peroxidation, and antioxidant capacity. Among the nine differentially expressed HvRBOHs during various malting stages, HvRBOHA and HvRBOHC showed most significant sustained changes in expression. RNAi knockdown lines with reduced expression of HvRBOHA/C gene exhibited genetic compensation via inducible expression of other gene family members during malting. However, the physiological consequence of reduced expression of HvRBOHA/C manifested as a poor malting quality profile attributable to low alpha-amylase activity and high levels of beta-glucan. We propose that the HvRBOHs play a critical role in modulating the redox milieu during the early stages of malting, which in turn can significantly impact carbohydrate metabolism.
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Shi Y, Chang YL, Wu HT, Shalmani A, Liu WT, Li WQ, Xu JW, Chen KM. OsRbohB-mediated ROS production plays a crucial role in drought stress tolerance of rice. PLANT CELL REPORTS 2020; 39:1767-1784. [PMID: 32980968 DOI: 10.1007/s00299-020-02603-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/17/2020] [Accepted: 09/13/2020] [Indexed: 06/11/2023]
Abstract
We found that a rice NADPH oxidase gene OsRbohB contributes drought tolerance and its functions are involved in the interaction of the OsRbohB-mediated ROS production and ABA signaling. The plasma membrane NADPH oxidases, also known as respiratory burst oxidase homologs, are the key producers of ROS under both normal and stress conditions in plants. However, their functions in rice development and stress tolerance are still under investigation. Here, we found that a rice NADPH oxidase gene OsRbohB, also named OsNOX1, is expressed in all tissues examined throughout the development stages with higher transcripts in leaves. The transcriptional expression of OsRbohB is also strongly stimulated by dehydration, salt and several phytohormonal treatments. Compared with wide-type and the OsRbohB-overexpressing transgenic plants, osrbohB, a Tos17 insertion knockout mutant of OsRbohB, shows lower ROS production, abscisic acid (ABA) content and transcripts of a series of stress-related genes. The osrbohB mutant also exhibits lower seed germination rate, organ size and thousand seed weight, but higher stomatal aperture and sensitivity to drought. Moreover, a number of genes involved in plant development, stress response, transcriptional regulation, and particularly ABA signaling are differentially expressed in osrbohB plants under both normal growth and drought conditions. All these results suggest the roles of OsRbohB in drought tolerance of rice, which probably performed through the interaction of the OsRbohB-mediated ROS production and ABA signaling.
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Affiliation(s)
- Yi Shi
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, 712100, Shanxi, China
| | - Yan-Li Chang
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, 712100, Shanxi, China
| | - Hai-Tao Wu
- College of Science, Northwest A&F University, Yangling, 712100, Shanxi, China
| | - Abdullah Shalmani
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, 712100, Shanxi, China
| | - Wen-Ting Liu
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, 712100, Shanxi, China
| | - Wen-Qiang Li
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, 712100, Shanxi, China
| | - Jian-Wei Xu
- College of Science, Northwest A&F University, Yangling, 712100, Shanxi, China
| | - Kun-Ming Chen
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, 712100, Shanxi, China.
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16
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Hammond C, Mira MM, Ayele BT, Renault S, Hill RD, Stasolla C. Over-expression of the Zea mays phytoglobin (ZmPgb1.1) alleviates the effect of water stress through shoot-specific mechanisms. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 155:384-395. [PMID: 32814275 DOI: 10.1016/j.plaphy.2020.07.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/20/2020] [Accepted: 07/21/2020] [Indexed: 06/11/2023]
Abstract
Water deficit limits plant growth and development by interfering with several physiological and molecular processes both in root and shoot tissues. Through their ability to scavenge nitric oxide (NO), phytoglobins (Pgbs) exercise a protective role during several conditions of stress. While their action has been mainly documented in roots, it is unclear whether Pgb exercises a specific and direct role in shoot tissue. We used a Zea mays root-less system to assess how over-expression or down-regulation of ZmPgb1.1 influences the behavior of shoots exposed to polyethylene glycol (PEG)-simulated water deficit. Relative to their WT and ZmPgb1.1 down-regulating counterparts, PEG-treated shoots over-expressing ZmPgb1.1 exhibited a reduced accumulation of ROS and lipid peroxidation. These effects were ascribed to lower transcript levels of Respiratory Burst Oxidase Homolog (RBOH) genes encoding the ROS generating enzyme complex NADPH oxidase, and a more active antioxidant system. Furthermore, over-expression of ZmPgb1.1 attenuated the reduction in osmotic potential and relative water content experienced during water stress, an observation also demonstrated at a whole plant level, possibly through the retention of the expression of three aquaporins involved in water transfer and implicated in drought tolerance. Pharmacological treatments modulating NO and ethylene levels revealed that the ZmPgb1.1 action was mediated by ethylene synthesis and response, with NO acting as an upstream intermediate. Collectively we provide substantial evidence that ZmPgb1.1 exercises a direct role in shoot tissue, independent from that previously reported in roots, which confers tolerance to water stress.
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Affiliation(s)
- Cassandra Hammond
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada
| | - Mohamed M Mira
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada
| | - Belay T Ayele
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada
| | - Sylvie Renault
- Department of Biological Science, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada
| | - Robert D Hill
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada
| | - Claudio Stasolla
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada.
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17
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Francesconi S, Balestra GM. The modulation of stomatal conductance and photosynthetic parameters is involved in Fusarium head blight resistance in wheat. PLoS One 2020; 15:e0235482. [PMID: 32603342 PMCID: PMC7326183 DOI: 10.1371/journal.pone.0235482] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 06/17/2020] [Indexed: 11/18/2022] Open
Abstract
Fusarium head blight (FHB) is one of the most devastating fungal diseases affecting grain crops and Fusarium graminearum is the most aggressive causal species. Several evidences shown that stomatal closure is involved in the first line of defence against plant pathogens. However, there is very little evidence to show that photosynthetic parameters change in inoculated plants. The aim of the present study was to study the role of stomatal regulation in wheat after F. graminearum inoculation and explore its possible involvement in FHB resistance. RT-qPCR revealed that genes involved in stomatal regulation are induced in the resistant Sumai3 cultivar but not in the susceptible Rebelde cultivar. Seven genes involved in the positive regulation of stomatal closure were up-regulated in Sumai3, but it is most likely, that two genes, TaBG and TaCYP450, involved in the negative regulation of stomatal closure, were strongly induced, suggesting that FHB response is linked to cross-talk between the genes promoting and inhibiting stomatal closure. Increasing temperature of spikes in the wheat genotypes and a decrease in photosynthetic efficiency in Rebelde but not in Sumai3, were observed, confirming the hypothesis that photosynthetic parameters are related to FHB resistance.
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Affiliation(s)
- Sara Francesconi
- Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università degli Studi della Tuscia, Viterbo, Italy
| | - Giorgio Mariano Balestra
- Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università degli Studi della Tuscia, Viterbo, Italy
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18
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Costa Silva Neta I, Vilela de Resende Von Pinho É, de Abreu VM, Rezende Vilela D, Santos MC, Oliveira Dos Santos H, Diniz Cabral Ferreira RA, Garcia Von Pinho R, Coelho de Castro Vasconcellos R. Gene expression and genetic control to cold tolerance during maize seed germination. BMC PLANT BIOLOGY 2020; 20:188. [PMID: 32349671 PMCID: PMC7191758 DOI: 10.1186/s12870-020-02387-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 04/06/2020] [Indexed: 05/27/2023]
Abstract
BACKGROUND The study of cold tolerance in maize seeds and seedlings through physiological quality assessments, as well as the genetic control associated with this trait, allows an early characterization of genotypes. Here we studied the genetic control for cold tolerance during the germination process in maize seeds and genes influenced by this stress. RESULTS Six maize lines were used, three classified as tolerant and three as susceptible to low germination temperature. A field was developed to produce the hybrid seeds, in a partial diallel scheme including the reciprocal crosses. For the expression analysis, seeds from two contrasting lines were used, as well as their hybrid combination and their reciprocal crosses, on dried and moistened seeds at 10 °C for 4 and 7 days. It was evaluated the catalase (CAT) and esterase (EST) enzymes, heat-resistant proteins and the genes Putative stearoyl-ACP desaturase (SAD), Ascorbate Peroxidase (APX), Superoxide Dismutase (SOD) and Mitogen Activated Protein Kinase (ZmMPK5). The estimated values for heterosis, general and specific combining abilities and reciprocal maternal and non-maternal effects were carried out and it showed that there is heterosis for germination at low temperatures, also the non-additive genes were more important and there was a reciprocal effect. CONCLUSIONS There is a greater expression of the CAT and EST enzymes in moistened seeds at seven days and there is less expression of heat-resistant proteins and the SAD gene at seven days of moistening. Also, there are variations in the expression of the APX, SOD and ZmMPK5 genes in dried and moistened seeds, as well as among the genotypes studied.
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19
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Hayat S, Ahmad H, Nasir M, Khan MN, Ali M, Hayat K, Khan MA, Khan F, Ma Y, Cheng Z. Some Physiological and Biochemical Mechanisms during Seed-to-Seedling Transition in Tomato as Influenced by Garlic Allelochemicals. Antioxidants (Basel) 2020; 9:antiox9030235. [PMID: 32178294 PMCID: PMC7139351 DOI: 10.3390/antiox9030235] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 03/06/2020] [Accepted: 03/06/2020] [Indexed: 11/16/2022] Open
Abstract
The effects of aqueous garlic extracts (AGEs), diallyl disulfide (DADS), and allicin (AAS) were investigated during seed-to-seedling transition of tomato. Independent bioassays were performed including seed priming with AGE (0, 100, and 200 µg∙mL-1), germination under the allelochemical influence of AGE, DADS, and AAS, and germination under volatile application of AGE. Noticeable differences in germination indices and seedling growth (particularly root growth and fresh weights) were observed in a dose-dependent manner. When germinated under 50 mM NaCl, seeds primed with AGE exhibited induced defense via antioxidant enzyme activities (superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT)), lipid peroxidation (malondialdehyde content (MDA)), and H2O2 scavenging. Enzyme-linked immunosorbent analysis (ELISA) of the endogenous phytohormones auxin (IAA), abscisic acid (ABA), cytokinin (ZR), and gibberellic acid (GA3) in the roots and shoots of the obtained seedlings and the relative expression levels of auxin-responsive protein (IAA2), like-auxin (LAX5), mitogen-activated protein kinase (MAPK7 and MPK2), respiratory burst oxidase homolog (RBOH1), CHI3 and SODCC1 suggested allelopathic functions in stimulating growth responses. Our findings suggest that garlic allelochemicals act as plant biostimulants to enhance auxin biosynthesis and transportation, resulting in root growth promotion. Additionally, the relative expressions of defense-related genes, antioxidant enzymes activities and phytohormonal regulations indicate activation of the defense responses in tomato seedlings resulting in better growth and development. These results, thus, provide a basis to understand the biological functions of garlic allelochemicals from the induced resistance perspective in plants.
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Affiliation(s)
- Sikandar Hayat
- College of Horticulture, Northwest A&F University, Yangling 712100, China
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China; (M.N.)
| | - Husain Ahmad
- College of Horticulture, Northwest A&F University, Yangling 712100, China
| | - Mubasher Nasir
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China; (M.N.)
| | - Muhammad Numan Khan
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China; (M.N.)
| | - Muhammad Ali
- College of Horticulture, Northwest A&F University, Yangling 712100, China
| | - Kashif Hayat
- Key Laboratory of Urban Agriculture (South), School of Agriculture and Biology, Ministry of Agriculture & Bor S. Luh Food Safety Research Center, SJTU, Shanghai 200240, China;
| | - Muhammad Ali Khan
- Department of Agriculture, Abdul Wali Khan University, Mardan 23200, Pakistan;
| | - Farmanullah Khan
- Department of Soil and Environmental Sciences, The University of Agriculture, Peshawar 25120, Pakistan;
| | - Yongqing Ma
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
- Correspondence: (Y.M.); (Z.C.)
| | - Zhihui Cheng
- College of Horticulture, Northwest A&F University, Yangling 712100, China
- Correspondence: (Y.M.); (Z.C.)
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Hu CH, Wang PQ, Zhang PP, Nie XM, Li BB, Tai L, Liu WT, Li WQ, Chen KM. NADPH Oxidases: The Vital Performers and Center Hubs during Plant Growth and Signaling. Cells 2020; 9:E437. [PMID: 32069961 PMCID: PMC7072856 DOI: 10.3390/cells9020437] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 02/08/2020] [Accepted: 02/10/2020] [Indexed: 12/14/2022] Open
Abstract
NADPH oxidases (NOXs), mostly known as respiratory burst oxidase homologs (RBOHs), are the key producers of reactive oxygen species (ROS) in plants. A lot of literature has addressed ROS signaling in plant development regulation and stress responses as well as on the enzyme's structure, evolution, function, regulation and associated mechanisms, manifesting the role of NOXs/RBOHs as the vital performers and center hubs during plant growth and signaling. This review focuses on recent advances of NOXs/RBOHs on cell growth, hormone interaction, calcium signaling, abiotic stress responses, and immunity. Several primary particles, including Ca2+, CDPKs, BIK1, ROPs/RACs, CERK, FER, ANX, SnRK and SIK1-mediated regulatory mechanisms, are fully summarized to illustrate the signaling behavior of NOXs/RBOHs and their sophisticated and dexterous crosstalks. Diverse expression and activation regulation models endow NOXs/RBOHs powerful and versatile functions in plants to maintain innate immune homeostasis and development integrity. NOXs/RBOHs and their related regulatory items are the ideal targets for crop improvement in both yield and quality during agricultural practices.
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Affiliation(s)
- Chun-Hong Hu
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
- College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou 466000, Henan, China
| | - Peng-Qi Wang
- School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Peng-Peng Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Xiu-Min Nie
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Bin-Bin Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Li Tai
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Wen-Ting Liu
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Wen-Qiang Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Kun-Ming Chen
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, Shaanxi, China
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21
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Zong N, Wang H, Li Z, Ma L, Xie L, Pang J, Fan Y, Zhao J. Maize NCP1 negatively regulates drought and ABA responses through interacting with and inhibiting the activity of transcription factor ABP9. PLANT MOLECULAR BIOLOGY 2020; 102:339-357. [PMID: 31894455 DOI: 10.1007/s11103-019-00951-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 12/18/2019] [Indexed: 05/06/2023]
Abstract
NCP1, a NINJA family protein lacking EAR motif, acts as a negative regulator of ABA signaling by interacting with and inhibiting the activity of transcriptional activator ABP9. The phytohormone abscisic acid plays a pivotal role in regulating plant responses to a variety of abiotic stresses including drought and salinity. Maize ABP9 is an ABRE-binding bZIP transcription activator that enhances plant tolerance to multiple stresses by positively regulating ABA signaling, but the molecular mechanism by which ABP9 is regulated in mediating ABA responses remains unknown. Here, we report the identification of an ABP9-interacting protein, named ABP Nine Complex Protein 1 (NCP1) and its functional characterization. NCP1 belongs to the recently identified NINJA family proteins, but lacks the conserved EAR motif, which is a hallmark of this class of transcriptional repressors. In vitro and in vivo assays confirmed that NCP1 physically interacts with ABP9 and that they are co-localized in the nucleus. In addition, NCP1 and ABP9 are similarly induced with similar patterns by ABA treatment and osmotic stress. Interestingly, NCP1 over-expressing Arabidopsis plants exhibited a reduced sensitivity to ABA and decreased drought tolerance. Transient assay in maize protoplasts showed that NCP1 inhibits the activity of ABP9 in activating ABRE-mediated reporter gene expression, a notion further supported by genetic analysis of drought and ABA responses in the transgenic plants over-expressing both ABP9 and NCP1. These data together suggest that NCP1 is a novel negative regulator of ABA signaling via interacting with and inhibiting the activity of ABP9.
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Affiliation(s)
- Na Zong
- Faculty of Maize Functional Genomics, Biotechnology Research Institute, National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Hanqian Wang
- Faculty of Maize Functional Genomics, Biotechnology Research Institute, National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Zaoxia Li
- Faculty of Maize Functional Genomics, Biotechnology Research Institute, National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Li Ma
- Faculty of Maize Functional Genomics, Biotechnology Research Institute, National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Li Xie
- Faculty of Maize Functional Genomics, Biotechnology Research Institute, National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Junling Pang
- Faculty of Maize Functional Genomics, Biotechnology Research Institute, National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Yunliu Fan
- Faculty of Maize Functional Genomics, Biotechnology Research Institute, National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China
| | - Jun Zhao
- Faculty of Maize Functional Genomics, Biotechnology Research Institute, National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China.
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22
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Tak H, Negi S, Rajpurohit YS, Misra HS, Ganapathi TR. MusaMPK5, a mitogen activated protein kinase is involved in regulation of cold tolerance in banana. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 146:112-123. [PMID: 31739146 DOI: 10.1016/j.plaphy.2019.11.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 11/06/2019] [Accepted: 11/06/2019] [Indexed: 06/10/2023]
Abstract
Mitogen activated protein kinases (MAPKs) are known to play important functions in stress responses of plants. We have functionally characterized a MAPK, MusaMPK5 from banana and demonstrated its function in cold tolerance response of banana plants. Expression of MusaMPK5 showed positive response to cold, methyl-jasmonate and salicylic acid treatment. Transgenic banana plants harbouring PMusaMPK5::GUS after exposure to cold stress (8 °C) showed strong induction of GUS in cells surrounding central vascular cylinder of corm and cortical cells of pseudostem. Transgenic banana lines overexpressing MusaMPK5 were regenerated and four different transgenic lines were confirmed for T-DNA insertions by Southern blot and PCR analysis. In an in-vitro growth assay transgenic lines gained better shoot length and fresh weight during recovery from cold stress indicating improved cold tolerance ability of transgenic lines than control plants. Leaf discs of transgenic lines bleached less and retain lower MDA content than leaf discs of control plants after cold stress (4 °C and 8 °C). Cold stress tolerance analysis using two month old plants suggested that improved cold tolerance ability of transgenic lines might be associated with increased level of proline and reduced MDA content. MusaMPK5 gets localized in cytoplasm as observed in onion epidermal cells transiently overexpressing either MusaMPK5-GFP or MusaMPK5-GUS fusion protein. MusaMPK5 is a functional kinase as it autophosphorylate itself and phosphorylate myelin basic protein (MBP) in an in vitro reaction. Purified MusaMPK5 can phosphorylate NAC042 and SNAC67 transcription factors of banana which are important regulators of stress tolerance in banana plants.
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Affiliation(s)
- Himanshu Tak
- Plant Cell Culture Technology Section, Nuclear Agriculture and Biotechnology Division, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai, 400094, India
| | - Sanjana Negi
- Department of Biotechnology, University of Mumbai, Mumbai, 400098, India
| | - Yogendra S Rajpurohit
- Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai, 400094, India
| | - Hari S Misra
- Molecular Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai, 400094, India
| | - T R Ganapathi
- Plant Cell Culture Technology Section, Nuclear Agriculture and Biotechnology Division, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai, 400094, India.
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23
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Yan JJ, Tong ZJ, Liu YY, Lin ZY, Long Y, Han X, Xu WN, Huang QH, Tao YX, Xie BG. The NADPH oxidase in Volvariella volvacea and its differential expression in response to mycelial ageing and mechanical injury. Braz J Microbiol 2019; 51:87-94. [PMID: 31667800 DOI: 10.1007/s42770-019-00165-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 04/29/2019] [Indexed: 02/03/2023] Open
Abstract
NADPH oxidases are enzymes that have been reported to generate reactive oxygen species (ROS) in animals, plants and many multicellular fungi in response to environmental stresses. Six genes of the NADPH oxidase complex components, including vvnoxa, vvnoxb, vvnoxr, vvbema, vvrac1 and vvcdc24, were identified based on the complete genomic sequence of the edible fungus Volvariella volvacea. The number of vvnoxa, vvrac1, vvbema and vvcdc24 transcripts fluctuated with ageing, and the gene expression patterns of vvnoxa, vvrac1 and vvbema were significantly positively correlated. However, the expression of vvnoxb and vvnoxr showed no significant difference during ageing. In hyphae subjected to mechanical injury stress, both O2- and H2O2 concentrations were increased. The expression of vvnoxa, vvrac1, vvbema and vvcdc24 was substantially upregulated, but vvnoxb and vvnoxr showed no response to mechanical injury stress at the transcriptional level. Additionally, the transcription of vvnoxa, vvrac1, vvbema and vvcdc24 could be repressed when the intracellular ROS were eliminated by diphenyleneiodonium (DPI) chloride and reduced glutathione (GSH) treatments. These results indicated a positive feedback loop involving NADPH oxidase and intracellular ROS, which might be the reason for the oxidative burst during injury stress.
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Affiliation(s)
- Jun-Jie Yan
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Zong-Jun Tong
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Yuan-Yuan Liu
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Zi-Yan Lin
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Ying Long
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Xing Han
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Wei-Nan Xu
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Qian-Hui Huang
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yong-Xin Tao
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Bao-Gui Xie
- Mycological Research Center, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China.
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24
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Li S, Wang N, Ji D, Zhang W, Wang Y, Yu Y, Zhao S, Lyu M, You J, Zhang Y, Wang L, Wang X, Liu Z, Tong J, Xiao L, Bai MY, Xiang F. A GmSIN1/GmNCED3s/GmRbohBs Feed-Forward Loop Acts as a Signal Amplifier That Regulates Root Growth in Soybean Exposed to Salt Stress. THE PLANT CELL 2019; 31:2107-2130. [PMID: 31227558 PMCID: PMC6751118 DOI: 10.1105/tpc.18.00662] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 05/07/2019] [Accepted: 06/17/2019] [Indexed: 05/18/2023]
Abstract
Abscisic acid (ABA) and reactive oxygen species (ROS) act as key signaling molecules in the plant response to salt stress; however, how these signals are transduced and amplified remains unclear. Here, a soybean (Glycine max) salinity-induced NAM/ATAF1/2/CUC2 (NAC) transcription factor encoded by SALT INDUCED NAC1 (GmSIN1) was shown to be a key component of this process. Overexpression of GmSIN1 in soybean promoted root growth and salt tolerance and increased yield under salt stress; RNA interference-mediated knockdown of GmSIN1 had the opposite effect. The rapid induction of GmSIN1 in response to salinity required ABA and ROS, and the effect of GmSIN1 on root elongation and salt tolerance was achieved by boosting cellular ABA and ROS contents. GmSIN1 upregulated 9-cis-epoxycarotenoid dioxygenase coding genes in soybean (GmNCED3s, associated with ABA synthesis) and Respiratory burst oxidase homolog B genes in soybean (GmRbohBs, associated with ROS generation) by binding to their promoters at a site that has not been described to date. Together, GmSIN1, GmNCED3s, and GmRbohBs constitute a positive feed-forward system that enables the rapid accumulation of ABA and ROS, effectively amplifying the initial salt stress signal. These findings suggest that the combined modulation of ABA and ROS contents enhances soybean salt tolerance.
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Affiliation(s)
- Shuo Li
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Nan Wang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Dandan Ji
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Wenxiao Zhang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Ying Wang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Yanchong Yu
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Shizhen Zhao
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Menghua Lyu
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Juanjuan You
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Yangyang Zhang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Luli Wang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Xiaofang Wang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Zhenhua Liu
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Jianhua Tong
- Hunan Provincial Key Laboratory of Phytohormones and Growth Development, Hunan Provincial Key Laboratory for Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha 410128, People's Republic of China
| | - Langtao Xiao
- Hunan Provincial Key Laboratory of Phytohormones and Growth Development, Hunan Provincial Key Laboratory for Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha 410128, People's Republic of China
| | - Ming-Yi Bai
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
| | - Fengning Xiang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao 266237, People's Republic China
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25
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Trevisan S, Trentin AR, Ghisi R, Masi A, Quaggiotti S. Nitrate affects transcriptional regulation of UPBEAT1 and ROS localisation in roots of Zea mays L. PHYSIOLOGIA PLANTARUM 2019; 166:794-811. [PMID: 30238472 DOI: 10.1111/ppl.12839] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 08/23/2018] [Accepted: 09/13/2018] [Indexed: 06/08/2023]
Abstract
Nitrogen (N) is an indispensable nutrient for crops but its availability in agricultural soils is subject to considerable fluctuation. Plants have developed plastic responses to external N fluctuations in order to optimise their development. The coordinated action of nitric oxide and auxin seems to allow the cells of the root apex transition zone (TZ) of N-deprived maize to rapidly sense nitrate (NO3 - ). Preliminary results support the hypothesis that reactive oxygen species (ROS) signalling might also have a role in this pathway, probably through a putative maize orthologue of UPBEAT1 (UPB1). To expand on this hypothesis and better understand the different roles played by different root portions, we investigated the dynamics of ROS production, and the molecular and biochemical regulation of the main components of ROS production and scavenging in tissues of the meristem, transition zone, elongation zone and maturation zone of maize roots. The results suggest that the inverse regulation of ZmUPB1 and ZmPRX112 transcription observed in cells of the TZ in response to nitrogen depletion or NO3 - supply affects the balance between superoxide (O2 •- ) and hydrogen peroxide (H2 O2 ) in the root apex and consequently triggers differential root growth. This explanation is supported by additional results on the overall metabolic and transcriptional regulation of ROS homeostasis.
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Affiliation(s)
- Sara Trevisan
- Department of Agriculture, Food, Natural Resources, Animals and the Environment, University of Padua, 35020, Legnaro, Padua, Italy
| | - Anna R Trentin
- Department of Agriculture, Food, Natural Resources, Animals and the Environment, University of Padua, 35020, Legnaro, Padua, Italy
| | - Rossella Ghisi
- Department of Agriculture, Food, Natural Resources, Animals and the Environment, University of Padua, 35020, Legnaro, Padua, Italy
| | - Antonio Masi
- Department of Agriculture, Food, Natural Resources, Animals and the Environment, University of Padua, 35020, Legnaro, Padua, Italy
| | - Silvia Quaggiotti
- Department of Agriculture, Food, Natural Resources, Animals and the Environment, University of Padua, 35020, Legnaro, Padua, Italy
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26
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Mei P, Song Z, Li ZA, Zhou C. Functional study of Csrbohs in defence response against Xanthomonas citri ssp. citri. FUNCTIONAL PLANT BIOLOGY : FPB 2019; 46:543-554. [PMID: 30940334 DOI: 10.1071/fp18243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 02/01/2019] [Indexed: 06/09/2023]
Abstract
NADPH oxidases, encoded by rbohs (respiratory burst oxidase homologues), transfer electrons from NADPH to molecular oxygen (O2) to generate superoxide anion (O2•-), which is the first step in the formation of hydrogen peroxide (H2O2) in the plant-pathogen interaction system. In the present work, six citrus rbohs (Csrbohs) genes were identified in citrus, and their possible involvement in resistance to Xanthomonas citri ssp. citri (Xcc) was examined. Inoculation with Xcc promoted the H2O2 production and induced expression of the Csrbohs, especially CsrbohD. Results showed that CsrbohD was markedly induced in the resistant genotype kumquat 'Luofu' [Fortunella margarita (Lour.) Swingle] compared with grapefruit 'Duncan' [Citrus paradisi (Linn.) Macf.]. Virus-induced gene silencing (VIGS) of CsrbohD resulted in reduced resistance to Xcc in grapefruit, but not in kumquat. Compared with non-silenced plants, canker-like symptoms were observed earlier, and they were more extensive in the CsrbohD-silenced grapefruit. Silencing of CsrbohD also suppressed the Xcc induced reactive oxygen species (ROS) burst, and resulted in accumulation of more Xcc bacterial colonies. Taken together, these data indicate that CsrbohD promotes resistance to Xcc, especially in grapefruit.
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Affiliation(s)
- Pengying Mei
- College of Plant Protection, Southwest University, Chongqing 400715, China
| | - Zhen Song
- Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Zhong An Li
- Citrus Research Institute, Southwest University, Chongqing 400712, China
| | - Changyong Zhou
- Citrus Research Institute, Southwest University, Chongqing 400712, China; and Corresponding author.
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27
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Chakrabarty A, Banik N, Bhattacharjee S. Redox-regulation of germination during imbibitional oxidative and chilling stress in an indica rice cultivar ( Oryza sativa L., Cultivar Ratna). PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2019; 25:649-665. [PMID: 31168230 PMCID: PMC6522599 DOI: 10.1007/s12298-019-00656-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 03/05/2019] [Accepted: 03/18/2019] [Indexed: 05/26/2023]
Abstract
Imbibitional oxidative stress of different magnitude, imposed by treatment with different titer of H2O2 (both elevated, 20 mM and low, 500 µM) to an indica rice cultivar (Oryza sativa L., Cultivar Ratna) caused formation of differential redox cues at the metabolic interface, as evident from significant alteration of ROS/antioxidant ratio, efficacy of ascorbate-glutathione cycle, radical scavenging property, modulation of total thiol content and expression of oxidative membrane protein and lipid damages as biomarkers of oxidative stress. All the redox parameters examined, substantiate the experimental outcome that treatment with elevated concentration of H2O2 caused serious loss of redox homeostasis and germination impairment, whereas low titre H2O2 treatment not only restored redox homeostasis but also improve germination and post-germinative growth. The inductive pulse of H2O2 (500 µM) exhibited significantly better performance of ascorbate-glutathione pathway, which was otherwise down-regulated significantly in 20 mM H2O2 treatment-raised seedlings. A comparison between imbibitional chilling stress-raised experimental rice seedlings with 20 mM H2O2 treated rice seedling revealed similar kind of generation of redox cues and oxidative stress response. Further, imbibitional H2O2 treatments in rice also revealed a dose-dependent regulation of expression of genes of Halliwell-Asada pathway enzymes, which is in consonance with the redox metabolic response of germinating rice seeds. In conclusion, a dose-dependent regulation of H2O2 mediated redox cues and redox regulatory properties during germination in rice are suggested, the knowledge of which may be exploited as a promising seed priming technology.
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Affiliation(s)
- Ananya Chakrabarty
- UGC Centre for Advanced Study, Plant Physiology and Biochemistry Research Laboratory, Department of Botany, The University of Burdwan, Burdwan, West Bengal India
| | - Nabanita Banik
- UGC Centre for Advanced Study, Plant Physiology and Biochemistry Research Laboratory, Department of Botany, The University of Burdwan, Burdwan, West Bengal India
| | - Soumen Bhattacharjee
- UGC Centre for Advanced Study, Plant Physiology and Biochemistry Research Laboratory, Department of Botany, The University of Burdwan, Burdwan, West Bengal India
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28
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Dong W, Gao T, Song Y. A wheat GTP-binding protein like gene reduces tolerance to low temperature in Arabidopsis. Biochem Biophys Res Commun 2019; 509:148-153. [PMID: 30579594 DOI: 10.1016/j.bbrc.2018.12.092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 12/13/2018] [Indexed: 11/20/2022]
Abstract
Low temperature adversely affects plant growth and crop yield. The studies largely focus on cold stress (<4 °C), while the response upon low temperature higher than 4 °C is rarely documented so far. Here, we isolate a GTP-binding protein β subunit like gene TaGPBL. TaGPBL is responsive to low temperature of 16 °C, and its ectopic overexpression in Arabidopsis results in more remarkable growth restriction under 16 °C, but has no effect under 22 °C. TaGBPL overexpression reduces the induction of cold-inducible genes and the activities of ROS scavengers and producers in lower temperature dependent manner. The data indicate that TaGBPL participates in the response to low temperature, which provides evidence for deepening our insight into the role of G-protein in temperature perception and signaling transduction.
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Affiliation(s)
- Wei Dong
- School of Life Science, Qufu Normal University, Qufu, Shandong, 273165, PR China
| | - Tianxue Gao
- School of Life Science, Qufu Normal University, Qufu, Shandong, 273165, PR China
| | - Yuguang Song
- School of Life Science, Qufu Normal University, Qufu, Shandong, 273165, PR China.
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Asad MAU, Zakari SA, Zhao Q, Zhou L, Ye Y, Cheng F. Abiotic Stresses Intervene with ABA Signaling to Induce Destructive Metabolic Pathways Leading to Death: Premature Leaf Senescence in Plants. Int J Mol Sci 2019; 20:E256. [PMID: 30634648 PMCID: PMC6359161 DOI: 10.3390/ijms20020256] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 12/27/2018] [Accepted: 12/28/2018] [Indexed: 12/19/2022] Open
Abstract
Abiotic stresses trigger premature leaf senescence by affecting some endogenous factors, which is an important limitation for plant growth and grain yield. Among these endogenous factors that regulate leaf senescence, abscisic acid (ABA) works as a link between the oxidase damage of cellular structure and signal molecules responding to abiotic stress during leaf senescence. Considering the importance of ABA, we collect the latest findings related to ABA biosynthesis, ABA signaling, and its inhibitory effect on chloroplast structure destruction, chlorophyll (Chl) degradation, and photosynthesis reduction. Post-translational changes in leaf senescence end with the exhaustion of nutrients, yellowing of leaves, and death of senescent tissues. In this article, we review the literature on the ABA-inducing leaf senescence mechanism in rice and Arabidopsis starting from ABA synthesis, transport, signaling receptors, and catabolism. We also predict the future outcomes of investigations related to other plants. Before changes in translation occur, ABA signaling that mediates the expression of NYC, bZIP, and WRKY transcription factors (TFs) has been investigated to explain the inducing effect on senescence-associated genes. Various factors related to calcium signaling, reactive oxygen species (ROS) production, and protein degradation are elaborated, and research gaps and potential prospects are presented. Examples of gene mutation conferring the delay or induction of leaf senescence are also described, and they may be helpful in understanding the inhibitory effect of abiotic stresses and effective measures to tolerate, minimize, or resist their inducing effect on leaf senescence.
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Affiliation(s)
- Muhammad Asad Ullah Asad
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China.
| | - Shamsu Ado Zakari
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China.
| | - Qian Zhao
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China.
| | - Lujian Zhou
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China.
| | - Yu Ye
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China.
| | - Fangmin Cheng
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China.
- Jiangsu Collaborative Innovation Centre for Modern Crop Production, Nanjing 210000, China.
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Sun M, Jiang F, Cen B, Wen J, Zhou Y, Wu Z. Respiratory burst oxidase homologue-dependent H 2 O 2 and chloroplast H 2 O 2 are essential for the maintenance of acquired thermotolerance during recovery after acclimation. PLANT, CELL & ENVIRONMENT 2018; 41:2373-2389. [PMID: 29851102 DOI: 10.1111/pce.13351] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 05/21/2018] [Accepted: 05/21/2018] [Indexed: 05/22/2023]
Abstract
Thermotolerance is improved by heat stress (HS) acclimation, and the thermotolerance level is "remembered" by plants. However, the underlying signalling mechanisms remain largely unknown. Here, we showed NADPH oxidase-mediated H2 O2 (NADPH-H2 O2 ), and chloroplast-H2 O2 promoted the sustained expression of HS-responsive genes and programmed cell death (PCD) genes, respectively, during recovery after HS acclimation. When spraying the NADPH oxidase inhibitor, diphenylene iodonium, after HS acclimation, the NADPH-H2 O2 level significantly decreased, resulting in a decrease in the expression of HS-responsive genes and the loss of maintenance of acquired thermotolerance (MAT). In contrast, compared with HS acclimation, NADPH-H2 O2 declined but chloroplast-H2 O2 further enhanced during recovery after HS over-acclimation, resulting in the reduced expression of HS-responsive genes and substantial production of PCD. Notably, the further inhibition of NADPH-H2 O2 after HS over-acclimation also inhibited chloroplast-H2 O2 , alleviating the severe PCD and surpassing the MAT of HS over-acclimation treatment. Due to the change in subcellular H2 O2 after HS acclimation, the tomato seedlings maintained a constant H2 O2 level during recovery, resulting in stable and lower total H2 O2 levels during a tester HS challenge conducted after recovery. We conclude that tomato seedlings increase their MAT by enhancing NADPH-H2 O2 content and controlling chloroplast-H2 O2 production during recovery, which enhances the expression of HS-responsive genes and balances PCD levels, respectively.
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Affiliation(s)
- Mintao Sun
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in East China, Ministry of Agriculture, Nanjing, China
| | - Fangling Jiang
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in East China, Ministry of Agriculture, Nanjing, China
| | - Benjian Cen
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in East China, Ministry of Agriculture, Nanjing, China
| | - Junqin Wen
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in East China, Ministry of Agriculture, Nanjing, China
| | - Yanzhao Zhou
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in East China, Ministry of Agriculture, Nanjing, China
| | - Zhen Wu
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in East China, Ministry of Agriculture, Nanjing, China
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Wang W, Chen D, Zhang X, Liu D, Cheng Y, Shen F. Role of plant respiratory burst oxidase homologs in stress responses. Free Radic Res 2018; 52:826-839. [DOI: 10.1080/10715762.2018.1473572] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Wei Wang
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai’an, Shandong, PR China
| | - Dongdong Chen
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai’an, Shandong, PR China
| | - Xiaopei Zhang
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai’an, Shandong, PR China
| | - Dan Liu
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai’an, Shandong, PR China
| | - Yingying Cheng
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai’an, Shandong, PR China
| | - Fafu Shen
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai’an, Shandong, PR China
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Kapoor K, Mira MM, Ayele BT, Nguyen TN, Hill RD, Stasolla C. Phytoglobins regulate nitric oxide-dependent abscisic acid synthesis and ethylene-induced program cell death in developing maize somatic embryos. PLANTA 2018; 247:1277-1291. [PMID: 29455261 DOI: 10.1007/s00425-018-2862-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 01/23/2018] [Indexed: 05/04/2023]
Abstract
During maize somatic embryogenesis, suppression of phytoglobins (Pgbs) reduced ABA levels leading to ethylene-induced programmed cell death in the developing embryos. These effects modulate embryonic yield depending on the cellular localization of specific phytoglobin gene expression. Suppression of Zea mays phytoglobins (ZmPgb1.1 or ZmPgb1.2) during somatic embryogenesis induces programmed cell death (PCD) by elevating nitric oxide (NO). While ZmPgb1.1 is expressed in many embryonic domains and its suppression results in embryo abortion, ZmPgb1.2 is expressed in the basal cells anchoring the embryos to the embryogenic tissue. Down-regulation of ZmPgb1.2 is required to induce PCD in these anchor cells allowing the embryos to develop further. Exogenous applications of ABA could reverse the effects caused by the suppression of either of the two ZmPgbs. A depletion of ABA, ascribed to a down-regulation of biosynthetic genes, was observed in those embryonic domains where the respective ZmPgbs were repressed. These effects were mediated by NO. Depletion in ABA content increased the transcription of genes participating in the synthesis and response of ethylene, as well as the accumulation of ethylene, which influenced embryogenesis. Somatic embryo number was reduced by high ethylene levels and increased with pharmacological treatments suppressing ethylene synthesis. The ethylene inhibition of embryogenesis was linked to the production of reactive oxygen species (ROS) and the execution of PCD. Integration of ABA and ethylene in the ZmPgb regulation of embryogenesis is proposed in a model where NO accumulates in ZmPgb-suppressing cells, decreasing the level of ABA. Abscisic acid inhibits ethylene biosynthesis and the NO-mediated depletion of ABA relieves this inhibition causing ethylene to accumulate. Elevated ethylene levels trigger production of ROS and induce PCD. Ethylene-induced PCD in the ZmPgb1.1-suppressing line [ZmPgb1.1 (A)] leads to embryo abortion, while PCD in the ZmPgb1.2-suppressing line [ZmPgb1.2 (A)] results in the elimination of the anchor cells and the successful development of the embryos.
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Affiliation(s)
- Karuna Kapoor
- Department of Plant Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Mohamed M Mira
- Department of Plant Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
- Department of Botany, Faculty of Science, Tanta University, Tanta, 31527, Egypt
| | - Belay T Ayele
- Department of Plant Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Tran-Nguyen Nguyen
- Department of Plant Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Robert D Hill
- Department of Plant Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Claudio Stasolla
- Department of Plant Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada.
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Song LX, Xu XC, Wang FN, Wang Y, Xia XJ, Shi K, Zhou YH, Zhou J, Yu JQ. Brassinosteroids act as a positive regulator for resistance against root-knot nematode involving RESPIRATORY BURST OXIDASE HOMOLOG-dependent activation of MAPKs in tomato. PLANT, CELL & ENVIRONMENT 2018; 41:1113-1125. [PMID: 28370079 DOI: 10.1111/pce.12952] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 02/20/2017] [Accepted: 02/26/2017] [Indexed: 05/03/2023]
Abstract
Interplay of hormones with reactive oxygen species (ROS) fine-tunes the response of plants to stress; however, the crosstalk between brassinosteroids (BRs) and ROS in nematode resistance is unclear. In this study, we found that low BR biosynthesis or lack of BR receptor increased, whilst exogenous BR decreased the susceptibility of tomato plants to Meloidogyne incognita. Hormone quantification coupled with hormone mutant complementation experiments revealed that BR did not induce the defence response by triggering salicylic acid (SA), jasmonic acid/ethylene (JA/ET) or abscisic acid (ABA) signalling pathway. Notably, roots of BR-deficient plants had decreased apoplastic ROS accumulation, transcript of RESPIRATORY BURST OXIDASE HOMOLOG1 (RBOH1) and WHITEFLY INDUCED1 (WFI1), and reduced activation of mitogen-activated protein kinase 1/2 (MPK1/2) and MPK3. Silencing of RBOH1, WFI1, MPK1, MPK2 and MPK3 all increased the root susceptibility to nematode and attenuated BR-induced resistance against the nematode. Significantly, suppressed transcript of RBOH1 compromised BR-induced activation of MPK1/2 and MPK3. These results strongly suggest that RBOH-dependent MPK activation is involved in the BR-induced systemic resistance against the nematode.
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Affiliation(s)
- Liu-Xia Song
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Xue-Chen Xu
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Fa-Nan Wang
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Yu Wang
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Xiao-Jian Xia
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Kai Shi
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Yan-Hong Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Jie Zhou
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Jing-Quan Yu
- Department of Horticulture, Zijingang Campus, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, 866 Yuhangtang Road, Hangzhou, 310058, China
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Wang X, Dong X, Feng Y, Liu X, Wang J, Zhang Z, Li J, Zhao Y, Shi S, Tu P. H 2O 2 and NADPH oxidases involve in regulation of 2-(2-phenylethyl)chromones accumulation during salt stress in Aquilaria sinensis calli. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 269:1-11. [PMID: 29606206 DOI: 10.1016/j.plantsci.2018.01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 12/31/2017] [Accepted: 01/04/2018] [Indexed: 06/08/2023]
Abstract
2-(2-Phenylethyl)chromones are the main compounds responsible for the quality of agarwood, which is widely used in traditional medicines, incenses and perfumes. H2O2 and NADPH oxidases (also known as respiratory burst oxidase homologs, Rbohs) mediate diverse physiological and biochemical processes in environmental stress responses. However, little is known about the function of H2O2 and NADPH oxidases in 2-(2-phenylethyl)chromones accumulation. In this study, we found that salt stress induced a transient increase in content of H2O2 and 2-(2-phenylethyl)chromones accumulation in Aquilaria sinensis calli. Exogenous H2O2 remarkably decreased the production of 2-(2-phenylethyl)chromones, while dimethylthiourea (DMTU), a scavenger of H2O2, significantly increased 2-(2-phenylethyl)chromones accumulation in salt treated calli. Three new H2O2-generating genes, named AsRbohA-C, were isolated and characterized from A. sinensis. Salt stress also induced a transient increase in AsRbohA-C expression and NADPH oxidase activity. Furthermore, exogenous H2O2 increased AsRbohA-C expression and NADPH oxidase activity, while DMTU inhibited AsRbohA-C expression and NADPH oxidase activity under salt stress. Moreover, diphenylene iodonium (DPI), the inhibitor of NADPH oxidases, reduced AsRbohA-C expression and NADPH oxidase activity, but significantly induced 2-(2-phenylethyl)chromones accumulation during salt stress. These results clearly demonstrated the central role of H2O2 and NADPH oxidases in regulation of salt-induced 2-(2-phenylethyl)chromones accumulation in A. sinensis calli.
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Affiliation(s)
- Xiaohui Wang
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Xianjuan Dong
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Yingying Feng
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Xiao Liu
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Jinling Wang
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Zhongxiu Zhang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, PR China
| | - Jun Li
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Yunfang Zhao
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China
| | - Shepo Shi
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China.
| | - Pengfei Tu
- Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, PR China.
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Ma T, Yoo MJ, Zhang T, Liu L, Koh J, Song WY, Harmon AC, Sha W, Chen S. Characterization of thiol-based redox modifications of Brassica napusSNF1-related protein kinase 2.6-2C. FEBS Open Bio 2018; 8:628-645. [PMID: 29632815 PMCID: PMC5881534 DOI: 10.1002/2211-5463.12401] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 12/09/2017] [Accepted: 01/29/2018] [Indexed: 01/04/2023] Open
Abstract
Sucrose nonfermenting 1‐related protein kinase 2.6 (SnRK2.6), also known as Open Stomata 1 (OST1) in Arabidopsis thaliana, plays a pivotal role in abscisic acid (ABA)‐mediated stomatal closure. Four SnRK2.6 paralogs were identified in the Brassica napus genome in our previous work. Here we studied one of the paralogs, BnSnRK2.6‐2C, which was transcriptionally induced by ABA in guard cells. Recombinant BnSnRK2.6‐2C exhibited autophosphorylation activity and its phosphorylation sites were mapped. The autophosphorylation activity was inhibited by S‐nitrosoglutathione (GSNO) and by oxidized glutathione (GSSG), and the inhibition was reversed by reductants. Using monobromobimane (mBBr) labeling, we demonstrated a dose‐dependent modification of BnSnRK2.6‐2C by GSNO. Furthermore, mass spectrometry analysis revealed previously uncharacterized thiol‐based modifications including glutathionylation and sulfonic acid formation. Of the six cysteine residues in BnSnRK2.6‐2C, C159 was found to have different types of thiol modifications, suggesting its high redox sensitivity and versatility. In addition, mBBr labeling on tyrosine residues was identified. Collectively, these data provide detailed biochemical characterization of redox‐induced modifications and changes of the BnSnRK2.6‐2C activity.
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Affiliation(s)
- Tianyi Ma
- College of Life Sciences Northeast Forestry University Harbin China.,Department of Biology Genetics Institute University of Florida Gainesville FL USA.,College of Life Sciences, Agriculture and Forestry Qiqihar University Heilongjiang China
| | - Mi-Jeong Yoo
- Department of Biology Genetics Institute University of Florida Gainesville FL USA
| | - Tong Zhang
- Department of Biology Genetics Institute University of Florida Gainesville FL USA
| | - Lihong Liu
- Department of Biology Genetics Institute University of Florida Gainesville FL USA
| | - Jin Koh
- Proteomics and Mass Spectrometry Interdisciplinary Center for Biotechnology Research University of Florida Gainesville FL USA
| | - Wen-Yuan Song
- Department of Plant Pathology University of Florida Gainesville FL USA.,Plant Molecular and Cellular Biology University of Florida Gainesville FL USA
| | - Alice C Harmon
- Department of Biology Genetics Institute University of Florida Gainesville FL USA.,Plant Molecular and Cellular Biology University of Florida Gainesville FL USA
| | - Wei Sha
- College of Life Sciences Northeast Forestry University Harbin China.,College of Life Sciences, Agriculture and Forestry Qiqihar University Heilongjiang China
| | - Sixue Chen
- Department of Biology Genetics Institute University of Florida Gainesville FL USA.,Proteomics and Mass Spectrometry Interdisciplinary Center for Biotechnology Research University of Florida Gainesville FL USA.,Plant Molecular and Cellular Biology University of Florida Gainesville FL USA
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Involvement of NADPH oxidase isoforms in the production of O2- manipulated by ABA in the senescing leaves of early-senescence-leaf (esl) mutant rice (Oryza sativa). PLoS One 2018; 13:e0190161. [PMID: 29309410 PMCID: PMC5757929 DOI: 10.1371/journal.pone.0190161] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 12/09/2017] [Indexed: 01/02/2023] Open
Abstract
In this study, the differences in reactive oxygen species (ROS) generation and abscisic acid (ABA) accumulation in senescing leaves were investigated by early-senescence-leaf (esl) mutant and its wild type, to clarify the relationship among ABA levels, ROS generation, and NADPH oxidase (Nox) in senescing leaves of rice (Oryza sativa). The temporal expression levels of OsNox isoforms in senescing leaves and their expression patterns in response to ABA treatment were determined through quantitative real-time reverse transcription PCR (qRT-PCR). Results showed that the flag leaf of the esl mutant generated more O2- concentrations and accumulated higher ABA levels than the wild-type cultivar did in the grain-filling stage. Exogenous ABA treatment induced O2- generation; however, it was depressed by diphenyleneiodonium chloride (DPI) pretreatment in the detached leaf segments. This finding suggested the involvement of NADPH oxidase in ABA-induced O2- generation. The esl mutant exhibited significantly higher expression of OsNox2, OsNox5, OsNox6, and OsNox7 in the initial of grain-filling stage, followed by sharply decrease. The transcriptional levels of OsNox1, OsNox3, and OsFR07 in the flag leaf of the esl mutant were significantly lower than those in the wild-type cultivar. The expression levels of OsNox2, OsNox5, OsNox6, and OsNox7 were significantly enhanced by exogenous ABA treatments. The enhanced expression levels of OsNox2 and OsNox6 were dependent on the duration of ABA treatment. The inducible expression levels of OsNox5 and OsNox7 were dependent on ABA concentrations. By contrast, exogenous ABA treatment severely repressed the transcripts of OsNox1, OsNox3, and OsFR07 in the detached leaf segments. Therefore, OsNox2, OsNox5, OsNox6, and OsNox7 were probably involved in the ABA-induced O2- generation in the initial stage of leaf senescence. Subsequently, other oxidases activated in deteriorating cells were associated with ROS generation and accumulation in the senescing leaves of the esl mutant. Conversely, OsNox1, OsNox3, and OsFR07 were not associated with ABA-induced O2- generation during leaf senescence.
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Jagodzik P, Tajdel-Zielinska M, Ciesla A, Marczak M, Ludwikow A. Mitogen-Activated Protein Kinase Cascades in Plant Hormone Signaling. FRONTIERS IN PLANT SCIENCE 2018; 9:1387. [PMID: 30349547 PMCID: PMC6187979 DOI: 10.3389/fpls.2018.01387] [Citation(s) in RCA: 164] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 08/31/2018] [Indexed: 05/02/2023]
Abstract
Mitogen-activated protein kinase (MAPK) modules play key roles in the transduction of environmental and developmental signals through phosphorylation of downstream signaling targets, including other kinases, enzymes, cytoskeletal proteins or transcription factors, in all eukaryotic cells. A typical MAPK cascade consists of at least three sequentially acting serine/threonine kinases, a MAP kinase kinase kinase (MAPKKK), a MAP kinase kinase (MAPKK) and finally, the MAP kinase (MAPK) itself, with each phosphorylating, and hence activating, the next kinase in the cascade. Recent advances in our understanding of hormone signaling pathways have led to the discovery of new regulatory systems. In particular, this research has revealed the emerging role of crosstalk between the protein components of various signaling pathways and the involvement of this crosstalk in multiple cellular processes. Here we provide an overview of current models and mechanisms of hormone signaling with a special emphasis on the role of MAPKs in cell signaling networks. One-sentence summary: In this review we highlight the mechanisms of crosstalk between MAPK cascades and plant hormone signaling pathways and summarize recent findings on MAPK regulation and function in various cellular processes.
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Affiliation(s)
- Przemysław Jagodzik
- Department of Plant Physiology, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Małgorzata Tajdel-Zielinska
- Department of Biotechnology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Agata Ciesla
- Department of Biotechnology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Małgorzata Marczak
- Department of Biotechnology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
| | - Agnieszka Ludwikow
- Department of Biotechnology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poznań, Poland
- *Correspondence: Agnieszka Ludwikow,
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Kaur G, Guruprasad K, Temple BRS, Shirvanyants DG, Dokholyan NV, Pati PK. Structural complexity and functional diversity of plant NADPH oxidases. Amino Acids 2018; 50:79-94. [PMID: 29071531 PMCID: PMC6492275 DOI: 10.1007/s00726-017-2491-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 09/11/2017] [Indexed: 10/18/2022]
Abstract
Plant NADPH oxidases also known as respiratory burst oxidase homologs (Rbohs) are a family of membrane-bound enzymes that play diverse roles in the defense response and morphogenetic processes via regulated generation of reactive oxygen species. Rbohs are associated with a variety of functions, although the reason for this is not clear. To evaluate using bioinformatics, the possible mechanisms for the observed functional diversity within the plant kingdom, 127 Rboh protein sequences representing 26 plant species were analyzed. Multiple clusters were identified with gene duplications that were both dicot as well as monocot-specific. The N-terminal sequences were observed to be highly variable. The conserved cysteine (equivalent of Cys890) in C-terminal of AtRbohD suggested that the redox-based modification like S-nitrosylation may regulate the activity of other Rbohs. Three-dimensional models corresponding to the N-terminal domain for Rbohs from Arabidopsis thaliana and Oryza sativa were constructed and molecular dynamics studies were carried out to study the role of Ca2+ in the folding of Rboh proteins. Certain mutations indicated possibly affect the structure and function of the plant NADPH oxidases, thereby providing the rationale for further experimental validation.
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Affiliation(s)
- Gurpreet Kaur
- Department of Biotechnology, Guru Nanak Dev University, Amritsar, India
- Bioinformatics, Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad, India
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
- Max Planck Institute for Developmental Biology, Tuebingen, Germany
| | - Kunchur Guruprasad
- Bioinformatics, Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad, India
| | - Brenda R S Temple
- R. L. Juliano Structural Bioinformatics Core Facility, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - David G Shirvanyants
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Nikolay V Dokholyan
- Department of Biochemistry and Biophysics, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Pratap Kumar Pati
- Department of Biotechnology, Guru Nanak Dev University, Amritsar, India.
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Mira MM, Huang S, Kapoor K, Hammond C, Hill RD, Stasolla C. Expression of Arabidopsis class 1 phytoglobin (AtPgb1) delays death and degradation of the root apical meristem during severe PEG-induced water deficit. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:5653-5668. [PMID: 29059380 PMCID: PMC5853930 DOI: 10.1093/jxb/erx371] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Maintenance of a functional root is fundamental to plant survival in response to some abiotic stresses, such as water deficit. In this study, we found that overexpression of Arabidopsis class 1 phytoglobin (AtPgb1) alleviated the growth retardation of polyethylene glycol (PEG)-induced water stress by reducing programmed cell death (PCD) associated with protein folding in the endoplasmic reticulum (ER). This was in contrast to PEG-stressed roots down-regulating AtPgb1 that exhibited extensive PCD and reduced expression of several attenuators of ER stress, including BAX Inhibitor-1 (BI-1). The death program experienced by the suppression of AtPgb1 in stressed roots was mediated by reactive oxygen species (ROS) and ethylene. Suppression of ROS synthesis or ethylene perception reduced PCD and partially restored root growth. The PEG-induced cessation of root growth was preceded by structural changes in the root apical meristem (RAM), including the loss of cell and tissue specification, possibly as a result of alterations in PIN1- and PIN4-mediated auxin accumulation at the root pole. These events were attenuated by the overexpression of AtPgb1 and aggravated when AtPgb1 was suppressed. Specifically, suppression of AtPgb1 compromised the functionality of the WOX5-expressing quiescent cells (QCs), leading to the early and premature differentiation of the adjacent columella stem cells and to a rapid reduction in meristem size. The expression and localization of other root domain markers, such as SCARECROW (SCR), which demarks the endodermis and QCs, and WEREWOLF (WER), which specifies the lateral root cap, were also most affected in PEG-treated roots with suppressed AtPgb1. Collectively, the results demonstrate that AtPgb1 exercises a protective role in roots exposed to lethal levels of PEG, and suggest a novel function of this gene in ensuring meristem functionality through the retention of cell fate specification.
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Affiliation(s)
- Mohamed M Mira
- Department of Botany, Faculty of Science, Tanta University, Tanta, Egypt
| | - Shuanglong Huang
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Karuna Kapoor
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Cassandra Hammond
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Robert D Hill
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Claudio Stasolla
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, Canada
- Correspondence:
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Yamauchi T, Yoshioka M, Fukazawa A, Mori H, Nishizawa NK, Tsutsumi N, Yoshioka H, Nakazono M. An NADPH Oxidase RBOH Functions in Rice Roots during Lysigenous Aerenchyma Formation under Oxygen-Deficient Conditions. THE PLANT CELL 2017; 29:775-790. [PMID: 28351990 PMCID: PMC5435434 DOI: 10.1105/tpc.16.00976] [Citation(s) in RCA: 129] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 03/06/2017] [Accepted: 03/24/2017] [Indexed: 05/18/2023]
Abstract
Reactive oxygen species (ROS) produced by the NADPH oxidase, respiratory burst oxidase homolog (RBOH), trigger signal transduction in diverse biological processes in plants. However, the functions of RBOH homologs in rice (Oryza sativa) and other gramineous plants are poorly understood. Ethylene induces the formation of lysigenous aerenchyma, which consists of internal gas spaces created by programmed cell death of cortical cells, in roots of gramineous plants under oxygen-deficient conditions. Here, we report that, in rice, one RBOH isoform (RBOHH) has a role in ethylene-induced aerenchyma formation in roots. Induction of RBOHH expression under oxygen-deficient conditions was greater in cortical cells than in cells of other root tissues. In addition, genes encoding group I calcium-dependent protein kinases (CDPK5 and CDPK13) were strongly expressed in root cortical cells. Coexpression of RBOHH with CDPK5 or CDPK13 induced ROS production in Nicotiana benthamiana leaves. Inhibitors of RBOH activity or cytosolic calcium influx suppressed ethylene-induced aerenchyma formation. Moreover, knockout of RBOHH by CRISPR/Cas9 reduced ROS accumulation and inducible aerenchyma formation in rice roots. These results suggest that RBOHH-mediated ROS production, which is stimulated by CDPK5 and/or CDPK13, is essential for ethylene-induced aerenchyma formation in rice roots under oxygen-deficient conditions.
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Affiliation(s)
- Takaki Yamauchi
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan
| | - Miki Yoshioka
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan
| | - Aya Fukazawa
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan
| | - Hitoshi Mori
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan
| | - Naoko K Nishizawa
- Graduate School of Agricultural and Life Sciences, University of Tokyo, Bunkyo, Tokyo 113-8657, Japan
- Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, Ishikawa 921-8836, Japan
| | - Nobuhiro Tsutsumi
- Graduate School of Agricultural and Life Sciences, University of Tokyo, Bunkyo, Tokyo 113-8657, Japan
| | - Hirofumi Yoshioka
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan
| | - Mikio Nakazono
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan
- UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Crawley WA 6009, Australia
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Hu W, Ding Z, Tie W, Yan Y, Liu Y, Wu C, Liu J, Wang J, Peng M, Xu B, Jin Z. Comparative physiological and transcriptomic analyses provide integrated insight into osmotic, cold, and salt stress tolerance mechanisms in banana. Sci Rep 2017; 7:43007. [PMID: 28223714 PMCID: PMC5320444 DOI: 10.1038/srep43007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 01/18/2017] [Indexed: 12/17/2022] Open
Abstract
The growth, development, and production of banana plants are constrained by multiple abiotic stressors. However, it remains elusive for the tolerance mechanisms of banana responding to multiple abiotic stresses. In this study, we found that Fen Jiao (FJ) was more tolerant to osmotic, cold, and salt stresses than BaXi Jiao (BX) by phenotypic and physiological analyses. Comparative transcriptomic analyses highlighted stress tolerance genes that either specifically regulated in FJ or changed more than twofold in FJ relative to BX after treatments. In total, 933, 1644, and 133 stress tolerance genes were identified after osmotic, cold, and salt treatments, respectively. Further integrated analyses found that 30 tolerance genes, including transcription factor, heat shock protein, and E3 ubiquitin protein ligase, could be commonly regulated by osmotic, cold, and salt stresses. Finally, ABA and ROS signaling networks were found to be more active in FJ than in BX under osmotic, cold, and salt treatments, which may contribute to the strong stress tolerances of FJ. Together, this study provides new insights into the tolerance mechanism of banana responding to multiple stresses, thus leading to potential applications in the genetic improvement of multiple abiotic stress tolerances in banana.
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Affiliation(s)
- Wei Hu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan province, 571101, China
| | - Zehong Ding
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan province, 571101, China
| | - Weiwei Tie
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan province, 571101, China
| | - Yan Yan
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan province, 571101, China
| | - Yang Liu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan province, 571101, China
| | - Chunlai Wu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan province, 571101, China
| | - Juhua Liu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan province, 571101, China
| | - Jiashui Wang
- Hainan Key Laboratory of Banana Genetic Improvement, Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Yilong W Road 2, Haikou, Hainan Province, 570102, China
| | - Ming Peng
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan province, 571101, China
| | - Biyu Xu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan province, 571101, China
| | - Zhiqiang Jin
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan province, 571101, China.,Hainan Key Laboratory of Banana Genetic Improvement, Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Yilong W Road 2, Haikou, Hainan Province, 570102, China
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Liu Y, He C. A review of redox signaling and the control of MAP kinase pathway in plants. Redox Biol 2016; 11:192-204. [PMID: 27984790 PMCID: PMC5157795 DOI: 10.1016/j.redox.2016.12.009] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 12/08/2016] [Indexed: 02/02/2023] Open
Abstract
Mitogen-activated protein kinase (MAPK) cascades are evolutionarily conserved modules among eukaryotic species that range from yeast, plants, flies to mammals. In eukaryotic cells, reactive oxygen species (ROS) has both physiological and toxic effects. Both MAPK cascades and ROS signaling are involved in plant response to various biotic and abiotic stresses. It has been observed that not only can ROS induce MAPK activation, but also that disturbing MAPK cascades can modulate ROS production and responses. This review will discuss the potential mechanisms by which ROS may activate and/or regulate MAPK cascades in plants. The role of MAPK cascades and ROS signaling in regulating gene expression, stomatal function, and programmed cell death (PCD) is also discussed. In addition, the relationship between Rboh-dependent ROS production and MAPK activation in PAMP-triggered immunity will be reviewed.
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Affiliation(s)
- Yukun Liu
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, College of Forestry, Southwest Forestry University, 300 Bailong Si, Kunming 650224, Yunnan, People's Republic of China; Key Laboratory for Forest Genetic and Tree Improvement & Propagation in Universities of Yunnan Province, College of Forestry, Southwest Forestry University, 300 Bailong Si, Kunming 650224, Yunnan, People's Republic of China.
| | - Chengzhong He
- Key Laboratory for Forest Genetic and Tree Improvement & Propagation in Universities of Yunnan Province, College of Forestry, Southwest Forestry University, 300 Bailong Si, Kunming 650224, Yunnan, People's Republic of China
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Jia H, Hao L, Guo X, Liu S, Yan Y, Guo X. A Raf-like MAPKKK gene, GhRaf19, negatively regulates tolerance to drought and salt and positively regulates resistance to cold stress by modulating reactive oxygen species in cotton. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2016; 252:267-281. [PMID: 27717463 DOI: 10.1016/j.plantsci.2016.07.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 06/24/2016] [Accepted: 07/23/2016] [Indexed: 05/06/2023]
Abstract
Mitogen-activated protein kinase kinase kinases (MAPKKKs) function at the top level of MAPK cascades and play important roles in plant development and stress responses. Although MAPKKKs comprise the largest family in the MAPK cascades, very few Raf-like MAPKKKs have been functionally identified, especially in the economically important crop cotton. In this study, a Raf-like MAPKKK gene, GhRaf19, was characterized for the first time in cotton. Our data show that the expression of GhRaf19 was inhibited by PEG and NaCl and induced by cold (4°C) and H2O2. Furthermore, when GhRaf19 was silenced in cotton using virus-induced gene silencing (VIGS), tolerance to drought and salt stress were enhanced, the accumulation of reactive oxygen species (ROS) was reduced, and ROS-related gene expression was increased. Consistent with these results, in N. benthamiana, overexpressing-GhRaf19 reduced tolerance to drought and salt. However, GhRaf19-silenced plants showed lowered resistance to cold in cotton, and this effect was correlated with the accumulation of ROS. In contrast, overexpressing GhRaf19 in N. benthamiana increased resistance to cold by inducing higher levels of expression and activity of ROS-related antioxidant genes/enzymes. These results indicate that GhRaf19 negatively regulates tolerance to drought and salt and positively regulates resistance to cold stress by modulating cellular ROS in cotton.
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Affiliation(s)
- Haihong Jia
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong, PR China
| | - Lili Hao
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong, PR China
| | - Xulei Guo
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong, PR China
| | - Shuchang Liu
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong, PR China
| | - Yan Yan
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong, PR China
| | - Xingqi Guo
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong, PR China.
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Dong Y, Liu J, Zhang Y, Geng H, Rasheed A, Xiao Y, Cao S, Fu L, Yan J, Wen W, Zhang Y, Jing R, Xia X, He Z. Genome-Wide Association of Stem Water Soluble Carbohydrates in Bread Wheat. PLoS One 2016; 11:e0164293. [PMID: 27802269 PMCID: PMC5089554 DOI: 10.1371/journal.pone.0164293] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 09/22/2016] [Indexed: 11/18/2022] Open
Abstract
Water soluble carbohydrates (WSC) in stems play an important role in buffering grain yield in wheat against biotic and abiotic stresses; however, knowledge of genes controlling WSC is very limited. We conducted a genome-wide association study (GWAS) using a high-density 90K SNP array to better understand the genetic basis underlying WSC, and to explore marker-based breeding approaches. WSC was evaluated in an association panel comprising 166 Chinese bread wheat cultivars planted in four environments. Fifty two marker-trait associations (MTAs) distributed across 23 loci were identified for phenotypic best linear unbiased estimates (BLUEs), and 11 MTAs were identified in two or more environments. Liner regression showed a clear dependence of WSC BLUE scores on numbers of favorable (increasing WSC content) and unfavorable alleles (decreasing WSC), indicating that genotypes with higher numbers of favorable or lower numbers of unfavorable alleles had higher WSC content. In silico analysis of flanking sequences of trait-associated SNPs revealed eight candidate genes related to WSC content grouped into two categories based on the type of encoding proteins, namely, defense response proteins and proteins triggered by environmental stresses. The identified SNPs and candidate genes related to WSC provide opportunities for breeding higher WSC wheat cultivars.
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Affiliation(s)
- Yan Dong
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jindong Liu
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yan Zhang
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hongwei Geng
- College of Agronomy, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi, Xinjiang, 830052, China
| | - Awais Rasheed
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Beijing, China
- International Maize and Wheat Improvement Center (CIMMYT) China Office, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yonggui Xiao
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shuanghe Cao
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Luping Fu
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jun Yan
- Cotton Research Institute, Chinese Academy of Agricultural Sciences, Anyang, Henan, China
| | - Weie Wen
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Beijing, China
- College of Agronomy, Xinjiang Agricultural University, 311 Nongda East Road, Urumqi, Xinjiang, 830052, China
| | - Yong Zhang
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ruilian Jing
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xianchun Xia
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhonghu He
- Institute of Crop Science/National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, Beijing, China
- International Maize and Wheat Improvement Center (CIMMYT) China Office, Chinese Academy of Agricultural Sciences, Beijing, China
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Wang YJ, Wei XY, Jing XQ, Chang YL, Hu CH, Wang X, Chen KM. The Fundamental Role of NOX Family Proteins in Plant Immunity and Their Regulation. Int J Mol Sci 2016; 17:ijms17060805. [PMID: 27240354 PMCID: PMC4926339 DOI: 10.3390/ijms17060805] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 05/10/2016] [Accepted: 05/11/2016] [Indexed: 01/01/2023] Open
Abstract
NADPH oxidases (NOXs), also known as respiratory burst oxidase homologs (RBOHs), are the major source of reactive oxygen species (ROS), and are involved in many important processes in plants such as regulation of acclimatory signaling and programmed cell death (PCD). Increasing evidence shows that NOXs play crucial roles in plant immunity and their functions in plant immune responses are not as separate individuals but with other signal molecules such as kinases, Rac/Rop small GTPases and hormones, mediating a series of signal transmissions. In a similar way, NOX-mediated signaling also participates in abiotic stress response of plants. We summarized here the complex role and regulation mechanism of NOXs in mediating plant immune response, and the viewpoint that abiotic stress response of plants may be a kind of special plant immunity is also proposed.
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Affiliation(s)
- Ya-Jing Wang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, China.
| | - Xiao-Yong Wei
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, China.
| | - Xiu-Qing Jing
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, China.
| | - Yan-Li Chang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, China.
| | - Chun-Hong Hu
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, China.
| | - Xiang Wang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, China.
| | - Kun-Ming Chen
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling 712100, China.
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Sytykiewicz H. Deciphering the role of NADPH oxidase in complex interactions between maize (Zea mays L.) genotypes and cereal aphids. Biochem Biophys Res Commun 2016; 476:90-5. [PMID: 27178208 DOI: 10.1016/j.bbrc.2016.05.050] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 05/09/2016] [Indexed: 02/06/2023]
Abstract
Plant NADPH oxidases (NOXs) encompass a group of membrane-bound enzymes participating in formation of reactive oxygen species (ROS) under physiological conditions as well as in response to environmental stressors. The purpose of the survey was to unveil the role of NADPH oxidase in pro-oxidative responses of maize (Zea mays L.) seedling leaves exposed to cereal aphids' infestation. The impact of apteral females of bird cherry-oat aphid (Rhopalosiphum padi L.) and grain aphid (Sitobion avenae F.) feeding on expression levels of all four NADPH oxidase genes (rbohA, rbohB, rbohC, rbohD) and total activity of NOX enzyme in maize plants were investigated. In addition, inhibitory effect of diphenylene iodonium (DPI) pre-treatment on NOX activity and hydrogen peroxide content in aphid-stressed maize seedlings was studied. Leaf infestation biotests were accomplished on 14-day-old seedlings representing two aphid-resistant varieties (Ambrozja and Waza) and two aphid-susceptible ones (Tasty Sweet and Złota Karłowa). Insects' attack led to profound upregulation of rbohA and rbohD genes in tested host plants, lower elevations were noted in level of rbohB mRNA, whereas abundance of rbohC transcript was not significantly altered. It was uncovered aphid-induced enhancement of NOX activity in examined plants. Higher increases in expression of all investigated rboh genes and activity of NADPH oxidase occurred in tissues of more resistant maize cultivars than in susceptible ones. Furthermore, DPI treatment resulted in strong reduction of NOX activity and H2O2 accumulation in aphid-infested Z. mays plants, thus evidencing circumstantial role of the enzyme in insect-elicited ROS generation.
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Affiliation(s)
- Hubert Sytykiewicz
- Siedlce University of Natural Sciences and Humanities, Department of Biochemistry and Molecular Biology, Prusa 12, 08-110 Siedlce, Poland.
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47
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Wang M, Zhao X, Xiao Z, Yin X, Xing T, Xia G. A wheat superoxide dismutase gene TaSOD2 enhances salt resistance through modulating redox homeostasis by promoting NADPH oxidase activity. PLANT MOLECULAR BIOLOGY 2016; 91:115-130. [PMID: 26869262 DOI: 10.1007/s11103-016-0446-y] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Accepted: 01/30/2016] [Indexed: 06/05/2023]
Abstract
Superoxide dismutase (SOD) is believed to enhance abiotic stress resistance by converting superoxide radical (O2 (-)) to H2O2 to lower ROS level and maintain redox homeostasis. ROS level is controlled via biphasic machinery of ROS production and scavenging. However, whether the role of SOD in abiotic stress resistance is achieved through influencing the biophasic machinery is not well documented. Here, we identified a wheat copper-zinc (Cu/Zn) SOD gene, TaSOD2, who was responsive to NaCl and H2O2. TaSOD2 overexpression in wheat and Arabidopsis elevated SOD activities, and enhanced the resistance to salt and oxidative stress. TaSOD2 overexpression reduced H2O2 level but accelerated O2 (-) accumulation. Further, it improved the activities of H2O2 metabolic enzymes, elevated the activity of O2 (-) producer NADPH oxidase (NOX), and promoted the transcription of NOX encoding genes. The inhibition of NOX activity and the mutation of NOX encoding genes both abolished the salt resistance of TaSOD2 overexpression lines. These data indicate that Cu/Zn SOD enhances salt resistance, which is accomplished through modulating redox homeostasis via promoting NOX activity.
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Affiliation(s)
- Mengcheng Wang
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, 27 Shandanan Road, Jinan, 250100, Shandong, China
| | - Xin Zhao
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, 27 Shandanan Road, Jinan, 250100, Shandong, China
| | - Zhen Xiao
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, 27 Shandanan Road, Jinan, 250100, Shandong, China
| | - Xunhao Yin
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, 27 Shandanan Road, Jinan, 250100, Shandong, China
| | - Tian Xing
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, 27 Shandanan Road, Jinan, 250100, Shandong, China
| | - Guangmin Xia
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, 27 Shandanan Road, Jinan, 250100, Shandong, China.
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Wang X, Zhang MM, Wang YJ, Gao YT, Li R, Wang GF, Li WQ, Liu WT, Chen KM. The plasma membrane NADPH oxidase OsRbohA plays a crucial role in developmental regulation and drought-stress response in rice. PHYSIOLOGIA PLANTARUM 2016; 156:421-43. [PMID: 26400148 DOI: 10.1111/ppl.12389] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 07/19/2015] [Accepted: 07/30/2015] [Indexed: 05/20/2023]
Abstract
Plasma membrane NADPH oxidases are major producers of reactive oxygen species (ROS) in plant cells under normal growth and stress conditions. In the present study the total activity of rice NADPH oxidases and the transcription of OsRbohA, which encodes an Oryza sativa plasma membrane NADPH oxidase, were stimulated by drought. OsRbohA was expressed in all tissues examined throughout development. Its mRNA was upregulated by a number of factors, including heat, drought, salt, oxidative stress and methyl jasmonate treatment. Compared with wild-type (WT), the OsRbohA-knockout mutant osrbohA exhibited upregulated expression of other respiratory burst oxidase homolog genes and multiple abnormal agronomic traits, including reduced biomass, low germination rate and decreased pollen viability and seed fertility. However, OsRbohA-overexpressing transgenic plants showed no differences in these traits compared with WT. Although osrbohA leaves and roots produced more ROS than WT, the mutant had lesser intracellular ROS. In contrast, OsRbohA-overexpressing transgenic plants exhibited higher ROS production at the intracellular level and in tissues. Ablation of OsRbohA impaired the tolerance of plants to various water stresses, whereas its overexpression enhanced the tolerance. In addition, a number of genes related to energy supply, substrate transport, stress response and transcriptional regulation were differentially expressed in osrbohA plants even under normal growth conditions, suggesting that OsRbohA has fundamental and broad functions in rice. These results indicate that OsRbohA-mediated processes are governed by complex signaling pathways that function during the developmental regulation and drought-stress response in rice.
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Affiliation(s)
- Xiang Wang
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Mao-Mao Zhang
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Ya-Jing Wang
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Yin-Tao Gao
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Ri Li
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Gang-Feng Wang
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Wen-Qiang Li
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Wen-Ting Liu
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Kun-Ming Chen
- State Key Laboratory of Crop Stress Biology in Arid Area/College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
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Chang YL, Li WY, Miao H, Yang SQ, Li R, Wang X, Li WQ, Chen KM. Comprehensive Genomic Analysis and Expression Profiling of the NOX Gene Families under Abiotic Stresses and Hormones in Plants. Genome Biol Evol 2016; 8:791-810. [PMID: 26907500 PMCID: PMC4824067 DOI: 10.1093/gbe/evw035] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Plasma membrane NADPH oxidases (NOXs) are key producers of reactive oxygen species under both normal and stress conditions in plants and they form functional subfamilies. Studies of these subfamilies indicated that they show considerable evolutionary selection. We performed a comparative genomic analysis that identified 50 ferric reduction oxidases (FRO) and 77 NOX gene homologs from 20 species representing the eight major plant lineages within the supergroup Plantae: glaucophytes, rhodophytes, chlorophytes, bryophytes, lycophytes, gymnosperms, monocots, and eudicots. Phylogenetic and structural analysis classified these FRO and NOX genes into four well-conserved groups represented as NOX, FRO I, FRO II, and FRO III. Further analysis of NOXs of phylogenetic and exon/intron structures showed that single intron loss and gain had occurred, yielding the diversified gene structures during the evolution of NOXs family genes and which were classified into four conserved subfamilies which are represented as Sub.I, Sub.II, Sub.III, and Sub.IV. Additionally, both available global microarray data analysis and quantitative real-time PCR experiments revealed that the NOX genes in Arabidopsis and rice (Oryza sativa) have different expression patterns in different developmental stages, various abiotic stresses and hormone treatments. Finally, coexpression network analysis of NOX genes in Arabidopsis and rice revealed that NOXs have significantly correlated expression profiles with genes which are involved in plants metabolic and resistance progresses. All these results suggest that NOX family underscores the functional diversity and divergence in plants. This finding will facilitate further studies of the NOX family and provide valuable information for functional validation of this family in plants.
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Affiliation(s)
- Yan-Li Chang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Wen-Yan Li
- Guangdong Academy of Agricultural Sciences, Argo-Biological Gene Research Center, Guangzhou, Guangdong, P. R. China
| | - Hai Miao
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Shuai-Qi Yang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Ri Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Xiang Wang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Wen-Qiang Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Kun-Ming Chen
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, P. R. China
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50
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Ma F, Ni L, Liu L, Li X, Zhang H, Zhang A, Tan M, Jiang M. ZmABA2, an interacting protein of ZmMPK5, is involved in abscisic acid biosynthesis and functions. PLANT BIOTECHNOLOGY JOURNAL 2016; 14:771-82. [PMID: 26096642 DOI: 10.1111/pbi.12427] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Revised: 04/24/2015] [Accepted: 04/27/2015] [Indexed: 05/08/2023]
Abstract
In maize (Zea mays), the mitogen-activated protein kinase ZmMPK5 has been shown to be involved in abscisic acid (ABA)-induced antioxidant defence and to enhance the tolerance of plants to drought, salt stress and oxidative stress. However, the underlying molecular mechanisms are poorly understood. Here, using ZmMPK5 as bait in yeast two-hybrid screening, a protein interacting with ZmMPK5 named ZmABA2, which belongs to a member of the short-chain dehydrogenase/reductase family, was identified. Pull-down assay and bimolecular fluorescence complementation analysis and co-immunoprecipitation test confirmed that ZmMPK5 interacts with ZmABA2 in vitro and in vivo. Phosphorylation of Ser173 in ZmABA2 by ZmMPK5 was shown to increase the activity of ZmABA2 and the protein stability. Various abiotic stimuli induced the expression of ZmABA2 in leaves of maize plants. Pharmacological, biochemical and molecular biology and genetic analyses showed that both ZmMPK5 and ZmABA2 coordinately regulate the content of ABA. Overexpression of ZmABA2 in tobacco plants was found to elevate the content of ABA, regulate seed germination and root growth under drought and salt stress and enhance the tolerance of tobacco plants to drought and salt stress. These results suggest that ZmABA2 is a direct target of ZmMPK5 and is involved in ABA biosynthesis and functions.
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Affiliation(s)
- Fangfang Ma
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
- College of Agriculture, Shanxi Agricultural University, Taigu, China
| | - Lan Ni
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Libo Liu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Xi Li
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Huan Zhang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Aying Zhang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Mingpu Tan
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
| | - Mingyi Jiang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China
- College of Life Sciences, Nanjing Agricultural University, Nanjing, China
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